Publikationen - Dr. Sergei Zvyagin

146. K. Yu. Povarov , Y. Skourskii, J. Wosnitza, D. E. Graf, Z. Zhao, and S. A. Zvyagin, High-field magnetic properties of the alternating ferromagnetic-antiferromagnetic  spin-chain compound Cu2(OH)3Br, Phys. Rev. B 110, 214421 (2024).

145. W. Lee , S. Yoon , Y.-S. Choi, S.-H. Do , A. N. Ponomaryov , S. A. Zvyagin, D. Gorbunov, J. Wosnitza,  A. Koda, W.-T. Chen, K.-Y. Choi, and S. Lee, Quasistatic magnetism in the breathing pyrochlore antiferromagnets LiGa1−xInxCr4O8 (x=0.2, 0.5), Phys. Rev. B 110, 144435 (2024).

144. Z. Wang, C.-M. Halati, J.-S. Bernier,  A.  Ponomaryov,   D.I. Gorbunov, S. Niesen , O. Breunig, J. M.  Klopf, S. Zvyagin,  T.  Lorenz, A. Loidl, and  C. Kollath, Experimental observation of repulsively  bound magnons, Nature 631, 760 (2024).

143.  K. Yu. Povarov, D. E. Graf, A.  Hauspurg, S. Zherlitsyn, J. Wosnitza, T. Sakurai, H. Ohta,  S. Kimura, H. Nojiri, V. O.  Garlea, A.  Zheludev,
A.  Paduan-Filho, M. Nicklas  and S. A. Zvyagin, Pressure-tuned quantum criticality in the large-D antiferromagnet DTN, Nature  Comm. 15,  2295 (2024).

142.  A. K. Bera, S. M. Yusuf, F. Orlandi, P. Manuel, L. Bhaskaran, and S. A. Zvyagin, Field-induced phase transitions and anisotropic magnetic properties of the Kitaev-Heisenberg compound Na2⁢Co2⁢Te⁢O6, Phys. Rev. B 108, 214419 (2023).

141.  S. V. Tumanov,  A. N. Ponomaryov, K. Yu.  Maryunina, A. S. Bogomyakov, V. I.  Ovcharenko, S. A. Zvyagin, M. V.  Fedin, and S. L. Veber, High-field EPR of copper(ii)-nitroxide compound exhibiting three-step phase transition: structural insights from the field-induced sample orientation, Dalton Trans.  52, 9337 (2023)

140. S. A. Zvyagin, A. N.  Ponomaryov, J.  Wosnitza, D. Hirai, Z. Hiroi, M. Gen, Y.  Kohama, A.  Matsuo, Y.H.  Matsuda, K. Kindo,  Dimensional reduction and incommensurate dynamic correlations in the S=1/2 triangular-lattice antiferromagnet Ca3ReO5Cl2, Nature Comm. 131, 6310 (2022).

139. A. K. Bera, S. M.  Yusuf, S. K.  Saha, M.  Kumar, D.  Voneshen, Y.  Skourski, S. A. Zvyagin, Nature Comm., 13, 6888 (2022).

138. A. A. Kulbakov, D.Y. Kononenko, S.  Nishimoto, Q.  Stahl, A. M  Chakkingal, M.  Feig, R.  Gumeniuk, Y.  Skourski, L. Bhaskaran,  S. A. Zvyagin, J. P.  Embs, I.  Puente-Orench, A.  Wildes, J. Geck, O. Janson, D. S.  Inosov, and D. C. Peets,  Coupled frustrated ferromagnetic and antiferromagnetic quantum spin chains in the quasi-one-dimensional mineral antlerite Cu3SO4(OH)(4), Phys. Rev. B 106, L020405 (2022).

137. J. Werner, C. Neef, C. Koo, A. Ponomaryov, S. Zvyagin, and R. Klingeler, Exceptional field dependence of antiferromagnetic magnons in LiFePO4, Phys. Rev. B 103, 174406 (2021).

136. L. Bhaskaran, A. N. Ponomaryov, J. Wosnitza, N. Khan, A. A. Tsirlin, M. E. Zhitomirsky, and S. A. Zvyagin, Antiferromagnetic resonance in the cubic iridium hexahalides (NH4)2IrCl6 and K2IrCl6, Phys. Rev. B 104, 184404 (2021).

135. T. Nomura, A. Hauspurg, D. I. Gorbunov, A. Miyata, E. Schulze, S. A. Zvyagin, V. Tsurkan, Y. H. Matsuda, Y. Kohama, and S. Zherlitsyn, Ultrasound measurement technique for the single-turn-coil magnets, Rev. of Scient. Instr. 92, 063902 (2021). 

134. S. A. Zvyagin, A. N. Ponomaryov, M. Ozerov, E. Schulze, Y. Skourski, R. Beyer, T. Reimann, L. I. Zviagina, E. L. Green, J. Wosnitza, I. Sheikin, P. Bouillot, T. Giamarchi, J. L. Wikara, M. M. Turnbull, and C. P. Landee, Magnetic properties of a quantum spin ladder in proximity to the isotropic limit, Phys. Rev. B 103, 205131 (2021).

133. S.A. Zvyagin, Spin dynamics in quantum sine-Gordon chains: high-field ESR studies, Appl. Magn. Res. 52, 337 (2021).

132. O. Prokhnenko, G. Marmorini, S. E. Nikitin, D. Yamamoto, A. Gazizulina, M. Bartkowiak, A. N. Ponomaryov, S. A. Zvyagin, H. Nojiri, I. F. Díaz-Ortega, L. M. Anovitz, A. I. Kolesnikov, and A. Podlesnyak, High-field spin-flop state in green dioptase, Phys. Rev. B 103, 014427 (2021).

131. J. Werner , C. Neef , C. Koo, S. Zvyagin , A. Ponomaryov , and R. Klingeler, Antisite disorder in the battery material LiFePO4, Phys. Rev. Mat. 4, 115403 (2020).

130 P. Tin, S. E. Stavretis, M. Ozerov, J. Krzystek, A. N. Ponomaryov, S. A. Zvyagin, J. Wosnitza, C.-C. Chen, P. P.-Y. Chen, J. Telser. and Z.-L. Xue, Advanced Magnetic Resonance Studies of Tetraphenylporphyrinatoiron(III) Halides, Appl. Magn. Res. 51, 1411 (2020).

129. D. Opherden, N. Nizar, K. Richardson, J. C. Monroe, M. M. Turnbull, M. Polson, S. Vela, W. J. A. Blackmore, P. A. Goddard, J. Singleton, E. S. Choi, F. Xiao, R. C. Williams, T. Lancaster, F. L. Pratt, S. J. Blundell, Y. Skourski, M. Uhlarz, A. N. Ponomaryov, S. A. Zvyagin, J. Wosnitza, M. Baenitz, I. Heinmaa, R. Stern, H. Kühne, and C. P. Landee, Extremely well isolated two-dimensional spin-21 antiferromagnetic Heisenberg layers with a small exchange coupling in the molecular-based magnet CuPOF, Phys. Rev. B 102, 064431 (2020).

128. Ponomaryov, L. Zviagina, J. Wosnitza, P. Lampen-Kelley, A. Banerjee, J.-Q. Yan, C. A. Bridges, D. G. Mandrus, S. E. Nagler, and S. A. Zvyagin, Nature of Magnetic Excitations in the High-Field Phase of α-RuCl3, Phys. Rev. Lett. 125, 037202 (2020).

127. T. Knaflic, P. Jeglic, M. Komelj, A. Zorko, P. K. Biswas, A. N. Ponomaryov, S. A. Zvyagin, M. Reehuis, A. Hoser, M. Geiß, J. Janek, P. Adler, C. Felser, M. Jansen, and D. Arcon, Spin-dimer ground state driven by consecutive charge and orbital ordering transitions in the anionic mixed-valence compound Rb4O6, Phys. Rev. B 101, 024419 (2020).

126. Yu.V. Krasnikova, V.N. Glazkov, A. Ponomaryov, S.A. Zvyagin, K.Y. Povarov, S. Galesky, and A. Zheludev, Electron spin resonance study of spin relaxation in the strong-leg spin ladder with nonmagnetic dilution, Phys. Rev. B 100, 144446 (2019).

125. E. Schulze, S. Arsenijevic, L. Opherden, A. N. Ponomaryov, J. Wosnitza, T. Ono, H. Tanaka, and S. A. Zvyagin, Evidence of one-dimensional magnetic heat transport in the triangular-lattice antiferromagnet Cs2CuCl4, Phys. Rev. Res. 1, 032022 (2019).

124. S. Hayashida, D. Blosser, K.Yu. Povarov, Z. Yan, S. Gvasaliya, A.N. Ponomaryov, S.A. Zvyagin, and A. Zheludev, One- and three-dimensional quantum phase transitions and anisotropy in Rb2Cu2Mo3O12, Phys. Rev. B 100, 134427 (2019).

123. S. Chattopadhyay, B. Lenz, S. Kanungo, Sushila, S.K. Panda, S. Biermann, W. Schnelle, K. Manna, R. Kataria, M. Uhlarz, Y. Skourski, S.A. Zvyagin, A. Ponomaryov, T. Herrmannsdorfer, R. Patra, and J. Wosnitza, Pronounced 2/3 magnetization plateau in a frustrated S=1 isolated spin-triangle compound: Interplay between Heisenberg and biquadratic exchange interactions, Phys. Rev. B 100 (094427) 2019.

122. S. Bettler, F. Landolt, O.M. Aksoy, Z. Yan, S. Gvasaliya, Y. Qiu, E. Ressouche, K. Beauvois, S. Raymond, A.N. Ponomaryov, S.A. Zvyagin, and A. Zheludev, Magnetic structure and spin waves in the frustrated ferro-antiferromagnet Pb2VO(PO4)2, Phys. Rev. B 99, 184437 (2019).

121. S.A. Zvyagin, D. Graf, T. Sakurai, S. Kimura, H. Nojiri, J. Wosnitza, H. Ohta, T. Ono, and H. Tanaka, Pressure-tuning the quantum spin Hamiltonian of the triangular lattice antiferromagnet Cs2CuCl4, Nature Comm. 10, 1064 (2019).

120. A. N. Ponomaryov, E. Schulze, J. Wosnitza, P. Lampen-Kelley, A. Banerjee, J.-Q. Yan, C. A. Bridges, D. G. Mandrus, S. E. Nagler, A. K. Kolezhuk, and S. A. Zvyagin, Unconventional spin dynamics in the honeycomb-lattice material α−RuCl3: High-field electron spin resonance studies, Phys. Rev. B 96, 241107(R) (2017).

119. A. Glamazda, Y. S. Choi, S.-H. Do, S. Lee, P. Lemmens, A. N. Ponomaryov, S. A. Zvyagin, J. Wosnitza, Dita Puspita Sari, I. Watanabe, and K.-Y. Choi, Quantum criticality in the coupled two-leg spin ladder Ba2CuTeO6, Phys. Rev. B 95, 184430 (2017).

118. A. N. Ponomaryov, L. Zviagina, J. Wosnitza, M. Thede, E. Ressouche, K. Yu. Povarov, A. Zheludev, C. P. Landee, and S. A. Zvyagin, Low-temperature magnetic structure and electron paramagnetic resonance properties of the quasi-one-dimensional S=1/2 Heisenberg helimagnet CuCl2⋅2NC5H5, Phys. Rev. B 95, 195125 (2017).

117. C. P. Saini, A. Barman, D. Das, B. Satpati, S. R. Bhattacharyya, D. Kanjilal, A. Ponomaryov, S. Zvyagin, and A. Kanjilal, Role of Oxygen Vacancy on the Hydrophobic Behavior of TiO2 Nanorods on Chemically Etched Si Pyramids, J. Phys. Chem. C 121, 278 (2017).

116. R. Tarasenko, A. Orendacova, E. Cizmar, M. Orendac, I. Potocnak, S. Zvyagin, A. Feher, Spin Anisotropy in Cu(tn)Cl-2: A Quasi-Two-Dimensional S=1/2 Spatially Anisotropic Triangular-Lattice Antiferromagnet, Journal of Physics Conference Series 903, 012005 (2017).

115. M.S. Henriques, D.I. Gorbunov, A.N. Ponomaryov, A. Saneei, M. Pourayoubi, D. Dusek, S. Zvyagin, M. Uhlarz, and J. Wosnitza, A monomeric copper-phosphoramide complex: Synthesis, structure, and electronic properties, Polyhedron 118, 154 (2016).

114. J. Wosnitza, S.A. Zvyagin, and S. Zherlitsyn, Frustrated magnets in high magnetic fields-selected examples, Reports on Progress in Physics 79, 074504 (2016).

113. A. Zorko, M. Gomilsek, M. Pregelj, M. Ozerov, S.A. Zvyagin, , A. Ozarowski, V. Tsurkan, A. Loidl, and O. Zaharko, Electron spin resonance insight into broadband absorption of the Cu3Bi(SeO3)(2)O2Br metamagnet, AIP Advances 6, 056210 (2016).

112. A.N. Ponomaryov, M. Ozerov, L. Zviagina, J. Wosnitza, K.Y. Povarov, A. Zheludev, C. Landee, E. Cizmar, A.A. Zvyagin, and S.A. Zvyagin, Electron spin resonance in a strong-rung spin-1/2 Heisenberg ladder, Phys. Rev. B 93, 134416 (2016).

111. A.C. Tiegel, A. Honecker, T. Pruschke, A. Ponomaryov, S.A. Zvyagin, R. Feyerherm, and S.R. Manmana, Dynamical properties of the sine-Gordon quantum spin magnet Cu-PM at zero and finite temperature, Phys. Rev. B 93, 104411 (2016).

110. M. Zlatar, M. Gruden, O.Yu. Vassilyeva, E.A. Buvaylo, A.N. Ponomarev, S.A. Zvyagin, J. Wosnitza, J. Krzystek, P. Garcia-Fernandez, and C. Duboc, Origin of the Zero-Field Splitting in Mononuclear Octahedral Mn-IV Complexes: A Combined Experimental and Theoretical Investigation, Inorganic Chem., 55, 1192 (2016).

109. M. Ozerov, M. Maksymenko, J. Wosnitza, A. Honecker, C.P. Landee, M.M. Turnbull, S.C. Furuya, T. Giamarchi, and S.A. Zvyagin, Electron spin resonance modes in a strong-leg ladder in the Tomonaga-Luttinger liquid phase, Phys. Rev. B 92, 24113 (2015).

108. S.A. Zvyagin, M. Ozerov, D. Kamenskyi, J. Wosnitza, J. Krzystek, D. Yoshizawa, M. Hagiwara, R. Hu, H. Ryu, C. Petrovic, and M. E. Zhitomirsky, Magnetic excitations in the spin-1/2 triangular-lattice antiferromagnet Cs2CuBr4, New J. Phys. 17, 113059 (2015).

107. M. Pregelj, O. Zaharko, A. Zorko, M. Gomilšek, O. Sendetskyi, A. Günther, M. Ozerov, S. A. Zvyagin, H. Luetkens, C. Baines, V. Tsurkan, and A. Loidl, Controllable Broadband Absorption in the Mixed Phase of Metamagnets, Adv. Functional Materials 25, 3634 (2015).

106. M. Vavra, I. Potočňák, M. Dušek, E. Čižmár, M. Ozerov, and S.A. Zvyagin, Low-dimensional compounds containing cyanido groups. XXVIII. Crystal structure, spectroscopic and magnetic properties of two copper(II) tetracyanidoplatinate complexes with 1,2-diaminopropane, J. Solid State Chemistry 225, 208 (2015).

105. M. Ozerov, J. Romhányi, M. Belesi, H. Berger, J.-Ph. Ansermet, Jeroen van den Brink, J. Wosnitza, S. A. Zvyagin, I. Rousochatzakis , Establishing the fundamental magnetic interactions in the chiral skyrmionic Mott insulator Cu2OSeO3 by terahertz electron spin resonance, Phys. Rev. Lett. 113, 157205 (2014).

104. S. A. Zvyagin, D. Kamenskyi, M. Ozerov, J. Wosnitza, M. Ikeda, T. Fujita, M. Hagiwara, A. I. Smirnov, T. A. Soldatov, A. Ya. Shapiro, J. Krzystek, R. Hu, H. Ryu, C. Petrovic, and M. E. Zhitomirsky, Direct determination of exchange parameters in Cs2CuBr4 and Cs2CuCl4: high-field electron-spin-resonance studies, Phys. Rev. Lett. 112, 077206 (2014).

103. E. Čižmár, M. Ozerov, K.W. Krämer, Ch. Rüegg, and S.A. Zvyagin, Observation of anisotropic exchange in a spin ladder by ESR, Acta Phys. Pol. A 126, 238 (2014).

102. R. Tarasenko, A. Orendáčová, E. Čižmár, S. Matas, M. Orendáč, V. Zelenak, V. Pavlik, K. Siemensmeyer, S.A. Zvyagin, J. Wosnitza, and A. Feher, Neutron and EPR study of Cu(tn)Cl-2 - a two-dimensional spatially anisotropic triangular-lattice antiferromagnet, Acta Phys. Pol. A 126, 232 (2014).

101. Z. Wang, D. Kamenskyi, O. Cepas, M. Schmidt, D.L. Quintero-Castro, A.T.M.N. Islam, B. Lake, A.A. Aczel, H.A. Dabkowska, A.B. Dabkowski, G.M. Y. Wan, A. Loidl, M. Ozerov, J. Wosnitza, S.A. Zvyagin, and J. Deisenhofer, High-field electron spin resonance spectroscopy of singlet-triplet transitions in the spin-dimer systems Sr3Cr2O8 and Ba3Cr2O8, Phys. Rev. B 89, 174406 (2014).

100. V. Tkac, A. Orendáčová, E. Čižmár, M. Orendáč, S.A. Zvyagin, A.G. Anders, V. Pavlik, and A. Feher, Experimental study of magnetic anisotropy in a layered CsNd(MoO4)2, J. of All. and Comp. 591, 100 (2014).

99. A.A. Validov, M. Ozerov, J. Wosnitza, S. Zvyagin, M.M Turnbull, C.P. Landee, and G.B Teitel'baum, ESR of coupled spin-1/2 chains in copper pyrazine dinitrate: unveiling geometrical frustration, J. Phys.: Cond. Matter 26, 026003 (2014).

98. U. Löw, S. Zvyagin, M. Ozerov, U. Schaufuss, V. Kataev, B. Wolf, and B. Lüthi, Magnetization, magnetic susceptibility and ESR in Tb3Ga5O12, Eur. Phys. J. B 86: 87 (2013).

97. A.-L. Barra, M. Goiran, R. Sessoli, S.A. Zvyagin, Resonance THz spectroscopy in high magnetic fields, Comptes Rendus Physics, 14, 106 (2013).

96. D. Kamenskyi, J. Wosnitza, J. Krzystek, A.A. Aczel, H.A. Dabkowska, A.B. Dabkowski, G.M. Luke, and S.A. Zvyagin, High-field ESR studies of the quantum spin dimer system Ba3Cr2O8, J. Low Temp. Phys. 170, 231 (2013).

95. P. Vrabel, M. Orendáč, A. Orendáčová, E. Čižmár, R. Tarasenko, S. Zvyagin, J. Wosnitza, J. Prokleska, V. Sechovsky, V. Pavlik, and S. Gao, Slow spin relaxation induced by magnetic field in [NdCo(bpdo)(H2O)4(CN)6] x 3H2O , J. Phys.: Cond. Matt. 25, 186003 (2013).

94. R. Tarasenko, A. Orendáčová, E. Čižmár, S. Matas, M. Orendáč, I. Potocnak, K. Siemensmeyer, S. Zvyagin, J. Wosnitza, and A. Feher, Spin anisotropy in Cu(en)(H2O)2SO4: A quasi-two-dimensional S=1/2 spatially anisotropic triangular-lattice antiferromagnet, Phys. Rev. B 87, 174401 (2013).

93. M. Ozerov, J. Wosnitza, E. Čižmár, R. Feyerherm, S.R. Manmana, F. Mila, S.A. Zvyagin, Field-induced gap in the spin-1/2 Heisenberg chain compound Cu-Pyrimidine Dinitrate: ESR studies in magnetic fields up to 63 T, J. Low Temp. Phys. 170, 268 (2013).

92. M.O. Liedke, M. Koerner, K. Lenz, M. Fritzsche, M. Ranjan, A. Keller, E. Čižmár, S.A. Zvyagin, S. Facsko, K. Potzger, J. Lindner, and J. Fassbender, Crossover in the surface anisotropy contributions of ferromagnetic films on rippled Si surfaces, Phys. Rev. B 87, 024424 (2013).

91. A.P. Forshaw, J.M. Smith, A. Ozarowski, J. Krzystek, D. Smirnov, S.A. Zvyagin, T.D. Harris, H.I. Karunadasa, J.M Zadrozny, A. Schnegg, K. Holldack, T.A. Jackson, A. Alamiri, D.M. Barnes, and J. Telser, Low-Spin Hexacoordinate Mn(III): Synthesis and spectroscopic investigation of Homoleptic Tris(pyrazolyl)borate and Tris(carbene)borate Complexes , Inorg. Chem. 52, 144 (2013).

90. Y. Kohama, S. Wang, A. Uchida, K. Prsa, S. Zvyagin, Y. Skourski, R.D. McDonald, L. Balicas, H.M. Ronnow, Ch. Rüegg, and M. Jaime, Anisotropic cascade of field-Induced phase transitions in the frustrated spin-ladder system BiCu2PO6, Phys. Rev. Lett. 109, 167204 (2012).

89. S.A. Zvyagin, Spin dynamics of S=1/2 Heisenberg chains with a staggered transverse field: electron spin resonance studies, Low Temp. Phys. 38, 819 (2012).

87. R. Tarasenko, A. Orendáčová, E. Čižmár, M. Orendáč, S. Zvyagin, and J. Wosnitza, EPR study of the two-dimensional quantum system Cu(en)(H2O)2SO4, Acta Phys. Pol. 121, 1095 (2012).

86. C. Psaroudaki, S.A. Zvyagin, J. Krzystek, A. Paduan-Filho, X. Zotos, and N. Papanicolaou, Magnetic excitations in the spin-1 anisotropic antiferromagnet NiCl2-4SC(NH2)2, Phys. Rev. B 85, 014412 (2012).

85. M.D. Drahus, P. Jakes, E. Erdem, S. Schaab, J. Chen, M. Ozerov, S. Zvyagin, and R.-A. Eichel, Manganese-doped (1 − x)BiScO3–xPbTiO3 high-temperature ferroelectrics: Defect structure and mechanism of enhanced electric resistivity, Phys. Rev. B 84, 064113 (2011).

84. J.L. Manson, S.H. Lapidus, P.W. Stephens, P.K. Peterson, K.E. Carreiro, H.I. Southerland, T. Lancaster, S.J. Blundell, A.J. Steele, P.A. Goddard, F. L. Pratt, J. Singleton, Y. Kohama, R.D. McDonald, R.E. Del Sesto, N.A. Smith, J. Bendix, S.A. Zvyagin, J.Kang, C. Lee, M.H. Whangbo, V. S. Zapf, and Alex Plonczak, Structural, electronic, and magnetic properties of quasi-1D quantum magnets [Ni(HF2)(pyz)2]X (pyz = pyrazine; X = PF6, SbF6): exhibiting Ni-FHF-Ni and Ni-pyz-Ni spin interactions, Inorg. Chem. 50, 5990 (2011).

83. M. Vavra, I. Potocnak, E. Čižmár, M. Kajnakova, M. Dusek, H. Schmidt, M. Ozerov, S.A. Zvyagin, L. Dlhan, R. Boca, Low-dimensional compounds containing cyanido groups. XXI. Crystal structure, spectroscopic, thermal and magnetic properties of two polymorphous, modifications of [Cu(men)2Pt(CN)4]n complex ((men) = N-methyl-1,2-diaminoethane), Polyhedron 30, 269 (2011).

82. S.A. Zvyagin, E. Čižmár, M. Ozerov, J. Wosnitza, R. Feyerherm, S.R. Manmana, and F. Mila, Field-induced gap in a quantum spin-1/2 chain in a strong magnetic field, Phys. Rev. B 83, 060409(R) (2011).

81. E. Čižmár, M. Ozerov, J. Wosnitza, B. Thielemann, K. W. Krämer, Ch. Rüegg, O. Piovesana, M. Klanjšek, M. Horvatić, C. Berthier, and S. A. Zvyagin, Anisotropy of magnetic interactions in the spin-ladder compound (C5H12N)2CuBr4, Phys. Rev. B 82, 054431 (2010).

80. M. Ozerov, A.A. Zvyagin, E. Čižmár, J. Wosnitza, R. Feyerherm, F. Xiao, C. P. Landee, and S. A. Zvyagin, Spin dynamics in S=1/2 chains with next-nearest-neighbor exchange interactions, Phys. Rev. B 82, 014416 (2010).

79. M. Orendáč, L. Sedláková, E. Čižmár, A. Orendáčová, A. Feher, S. A. Zvyagin, J. Wosnitza, W. H. Zhu, Z. M. Wang, and S. Gao, Spin relaxation and resonant phonon trapping in [Gd2(fum)3(H2O)4]x3H2O, Phys. Rev. B 81, 214410 (2010).

78. J. Krzystek, D.C. Swenson, S.A. Zvyagin, D. Smirnov, A. Ozarowski, and J. Telser, Cobalt(II) "Scorpionate" Complexes as models for cobalt-substituted zinc enzymes: electronic structure investigation by high-frequency and -field electron paramagnetic resonance spectroscopy, J. Am. Chem. Soc. 132, 5241 (2010).

77. D. Kropman, E. Mellikov, A. Oepik, K. Lott, T. Kaerner, I. Heinmaa, T. Laas, A. Medvid, W. Skorupa, S. Prucnal, L. Rebohle, S. Zvyagin, E. Čižmár, M. Ozerov, and J. Wosnitza, Interaction of point defects with impurities in the Si-SiO2 system and its influence on the properties of the interface, Thin Solid Films 518, 2374 (2010).

76. E. Čižmár, M. Ozerov, Y. Skourski, S.A. Zvyagin, J.A. Schlueter, J. L. Manson, and J. Wosnitza, High-field magnetization study of [Cu(pyz)2(HF2)]PF6: an S=1/2 quasi-two-dimensional Heisenberg magnet, J. Low Temp. Phys. 159, 92 (2010). 75. E. Čižmár, S.A. Zvyagin, R. Beyer, M. Uhlarz, M. Ozerov, Y. Skourski, J.L. Manson, J.A. Schlueter, and J. Wosnitza, Magnetic properties of the quasi-two-dimensional S=1/2 Heisenberg antiferromagnet [Cu(pyz)2(HF2)]PF6, Phys. Rev. B 81, 064422 (2010).

74. S.Q. Zhou, E. Čižmár, K. Potzger, M. Krause, G. Talut, M. Helm, J. Fassbender, S. A. Zvyagin, J. Wosnitza, and H. Schmidt, Origin of magnetic moments in defective TiO2 single crystals, Phys. Rev. B 79, 113201 (2009). 73. A. Orendáčová, E. Čižmár, L. Sedláková, J. Hanko, M. Kajňaková, M. Orendáč, A. Feher, J. S. Xia, L. Yin, D. M. Pajerowski, M. W. Meisel, V. Zeleňák, S. Zvyagin, and J. Wosnitza, Interplay of frustrations and magnetic field in the two-dimensional quantum magnet Cu(tn)Cl2, Phys. Rev. B 80, 144418 (2009).

72. S.A. Zvyagin, M. Ozerov, E. Čižmár, D. Kamenskyi, S. Zherlistyn, T. Herrmannsdörfer, J. Wosnitza, R. Wünsch, and W. Seidel, Terahertz-range free-electron laser electron spin resonance spectroscopy: Techniques and applications in high magnetic fields, Rev. Scient. Instr. 80, 073102 (2009).

71. I. Potocnak, M. Vavra, E. Čižmár, M. Kajnakova, A. Radvakova, D. Steinborn, S.A. Zvyagin, J. Wosnitza, and A. Feher, Low-dimensional compounds containing cyano groups. XVII. Crystal structure, spectroscopic, thermal and magnetic properties of [Cu(bmen)2][Pt(CN)4] (bmen = N,N '-dimethylethylenediamine), J. Solid State Chem. 182, 196 (2009).

70. S.Q. Zhou, G. Talut, K. Potzger, A. Shalimov, J. Grenzer, W. Skorupa, M. Helm, J. Faasbender, E. Čižmár, S.A. Zvyagin, and J. Wosnitza, Crystallographically oriented Fe nanocrystals formed in Fe-implanted TiO2, J. of Appl. Physics 103, 083907 (2008).

69. S.A. Zvyagin, J. Wosnitza, A.K. Kolezhuk, V.S. Zapf, M. Jaime, A. Paduan-Filho, V.N. Glazkov, S.S. Sosin, and A.I. Smirnov, Spin dynamics of NiCl2-4SC(NH2)2 in the field-induced ordered phase, Phys. Rev. B 77, 092413 (2008).

68. E. Čižmár, M. Ozerov, O. Ignatchik, T.P. Papageorgiou, J. Wosnitza, S.A. Zvyagin, J. Krzystek, Z. Zhou, C.P. Landee, B.R. Landry, M.M. Thurnbull, and J.L. Wikara, Magnetic properties of the Haldane-gap material [Ni(C2H8N2)2NO2](BF4), New J. of Physics 10, 033008 (2008).

67. S.A. Zvyagin, C. D. Batista, J. Krzystek, V. S. Zapf, M. Jaime, A. Paduan-Filho,and J. Wosnitza, Observation of two-magnon bound states in the spin-1 anisotropic Heisenberg antiferromagnetic chain system NiCl2-4SC(NH2)2, Physica B 403, 1497 (2008).

66. R.P. Prasankumar, H.J. Lee, H. Okamura, H. Imai, Y. Shimakawa, Y. Kubo, S. Zvyagin, K. Kamenev, G. Balakrishnan, D. Mck. Paulf, S.A. Trugman, A.J. Taylor, and R.D. Averitt, Probing nanoscale inhomogeneities in transition metal oxides with ultrafast mid-infrared spectroscopy, Physica B – Cond. Matt. 403, 1401 (2008).

65. V. Gnezdilov, V. Bedarev, S. Gnatchenko, M. Pashchenko; Yu. Pashkevich, P. Lemmens, S. Zvyagin, X. Mo, W. Queen, and S.-J. Hwu, Structural phase transition in two-dimensional tetramer-cuprate Na5RbCu4(AsO4)4Cl2, Low Temp. Physics 33: 684, 2007.

64. R. P. Prasankumar, S. Zvyagin, K. V. Kamenev, G. Balakrishnan, D. Mck. Paul, A. J. Taylor, and R. D. Averitt, Phase inhomogeneities in the charge-orbital-ordered manganite Nd0.5Sr0.5MnO3 revealed through polaron dynamics, Phys. Rev. B 76, 020402(R) (2007).

63. S.A. Zvyagin, J. Wosnitza, J. Krzystek, R. Stern, M. Jaime, Y. Sasago, and K. Uchinokura, Spin-triplet excitons and anisotropy effects in the S=1/2 gapped antiferromagnet BaCuSi2O6, J. Magn. and Magn. Mat. 310, 1206 (2007).

62. S.A. Zvyagin, J. Wosnitza, A.K. Kolezhuk, J. Krzystek, and R. Feyerherm, Electron spin resonance in S=1/2 Heisenberg chains with alternating g-tensor and the Dzyaloshinskii-Moriya interaction. J. Magn. and Magn. Mat. 310, 1209 (2007). 61. J. Wosnitza, A.D. Bianchi, J. Freudenberger, J. Haase, T. Herrmannsdoerfer, N. Kozlova, L. Schultz, Y. Skourski, S. Zherlitsyn, and S.A. Zvyagin, Dresden pulsed magnetic field facility, J. Magn. and Magn. Mat. 310, 2728 (2007).

60. S.A. Zvyagin, J. Wosnitza, C. D. Batista, M. Tsukamoto, N. Kawashima, J. Krzystek, V. S. Zapf, M. Jaime, N. F. Oliveira, Jr.,and A. Paduan-Filho, Magnetic excitations in the spin-1 anisotropic Heisenberg antiferromagnetic chain System NiCl2-4SC(NH2)2, Phys. Rev. Lett. 98, 047205 (2007).

59. S.A. Zvyagin, J. Wosnitza, A.K. Kolezhuk, J. Krzystek, and R. Feyerherm, Elementary excitations in S=1/2 Heisenberg chains with alternating g-tensor and the Dzyaloshinskii-Moriya interaction, J. Phys: Conf. Ser. 51, 39 (2006).

58. P.J. Desrochers, J. Telser, S.A. Zvyagin, A. Ozarowski, J. Krzystek, and D.A. Vicic, Electronic structure of four-coordinate C3v nickel(II) scorpionate complexes: investigation by high-frequency and -field electron paramagnetic resonance and electronic absorption spectroscopies, Inorg. Chem. 45 (22), 8930 (2006).

57. S. Zherlitsyn, A.D. Bianchi, T. Herrmannsdoerfer, F. Pobell, Yu. Scourski, A. Sytcheva, S. Zvyagin, and J. Wosnitza, Coil design for non-destructive pulsed-field magnets targeting 100 T, IEEE Transactions on Apll. Supercond. 16, 1660 (2006).

56. S.A. Zvyagin, J. Wosnitza, J. Krzystek, R. Stern, M. Jaime, Y. Sasago, and K. Uchinokura, Spin-triplet excitons in the S=1/2 gapped antiferromagnet BaCuSi2O6: electron paramagnetic resonance studies, Phys. Rev. B. 73, 094446 (2006).

55. J. Krzystek, S.A. Zvyagin, A. Ozarowski, S. Trofimenko, and J. Telser, Tunable-frequency high-field electron paramagnetic resonance, J. Magn. Res. 178, 174 (2006).

54. J. Cao, J.T. Haraldsen, S. Brown, J.L. Musfeld, J.R. Thompson, S.A. Zvyagin, J. Krzystek, M.-H. Whangbo, S.E. Nagler, and C.C. Torardi, Understanding low-energy magnetic excitations and hydrogen bonding in VOHPO4 x 1/2 H2O, Phys. Rev. B 72, 214421 (2005).

53. J. Telser, J. van Slageren, S. Vongtragool, M. Dressel, W. M. Reiff, S.A. Zvyagin, A. Ozarowski, and J. Krzystek, High-frequency-field EPR spectroscopy of the high-spin ferrous ion in hexaaqua complexes, Magn. Reson. Chemistry 43, S130 (2005).

52. Y. Oshima, E. Jobiliong, J.S. Brooks, S.A. Zvyagin, J. Krzystek, H. Tanaka, A. Kobayashi, H. Cui, and H. Kobayashi, EMR measurements of field-induced superconductor lambda-(BETS)2FexGa1-xCl4, Synth. Metals 153 (1-3), 365 Part 2 Sp. Iss. SI (2005).

51. J. Krzystek; A. Ozarowski, S. Trofimenko, S.A. Zvyagin, and J. Telser, Tunable-frequency Electron Paramagnetic Resonance – a novel tool to investigate high-spin transition metal coordination complexes, Adv. Coord. and Bioinorg. Chemistry 2005, 143-158 (2005).

50. S.E. Sebastian, D. Yin, P. Tanedo, G.A. Jorge, N. Harrison, M. Jaime, Y. Mozharivskyj, G. Miller, J. Krzystek, S.A. Zvyagin, and I.R. Fisher, High-field behaviour of the spin gap compound Sr2Cu(BO3)2, Phys. Rev. B 71, 212405 (2005).

49. D.E. Lansky, B. Mandimutsira, B. Ramdhanie, M. Clausen, J. Penner-Hahn, S.A. Zvyagin, J. Telser, J. Krzystek, R.Q. Zhan, Z.P. Ou, K.M. Kadish, L. Zakharov, A.L. Rheingold, and D.P. Goldberg , Synthesis, characterization, and physicochernical properties of manganese(III) and manganese(V)-oxo corrolazines, Inorg. Chemistry 44 (13): 4485 (2005).

48. S.A. Zvyagin, A.K. Kolezhuk, J. Krzystek, and R. Feyerherm, Electron Spin Resonance in sine-Gordon spin chains in the perturbative spinon regime, Phys. Rev. Lett. 95, 017207 (2005).

47. Y. Yukawa, G. Aromi, S. Igarashi, J. Ribas, S.A. Zvyagin, and J. Krzystek, [GdNi6] and [LaNi6]: high-field EPR spectroscopy and magnetic studies of exchange-coupled octahedral clusters, Angew. Chem. Int. Ed. 44, 1997 (2005).

46. J. Telser, J. Krzystek, S. Zvyagin, A. Ozarowski, A.T. Fiedler, and T.C. Brunold, Definitive spectroscopic determination of zero-field splitting in high-spin cobalt(II), Abstracts of papers of the Am. Chem. Soc. 227: U1555-U1555 954-INOR Part 1, MAR 28 (2004).

45. S.A. Zvyagin, High-field ESR Spectroscopy of low-dimensional quantum spin systems, in Spectroscopy of Emerging Materials, ed. by E.C. Faulques, D.L. Perry, and A.V. Yeremenko, NATO ARW Series, 2004 Kluwer Academic Publishers, The Netherlands

44. S. Zvyagin, G. Cao, Y. Xin, S. McCall, T. Caldwell, W. Moulton, L.-C. Brunel, A. Angerhofer, and J.E. Crow, Dimer liquid state in the quantum antiferromagnet compound LiCu2O2, Phys. Rev. B 69, 189901, 2004) – Erratum

43. M. Jaime, V.F. Correa, N. Harrison, C.D. Batista, N. Kawashima, Y. Kazuma, G.A. Jorge, R. Stern, I. Heinmaa, S.A. Zvyagin, Y. Sasago, K. and Uchinokura, Magnetic-Field-Induced Condensation of Triplons in Han Purple Pigment BaCuSi2O6, Phys. Rev. Lett. 93, 087203 (2004).

42. J. Krzystek, A.T. Fiedler, J.J. Sokol, A. Ozarowski, S.A. Zvyagin, T.C. Brunold, J.R. Long, L.C. Brunel, and J. Telser, Pseudooctahedral complexes of vanadium(III): electronic structure investigation by magnetic and electronic spectroscopy, Inorg. Chemistry 43, 5645-5658 (2004).

41. D. Viehland, J.F. Li, S. Zvyagin, A.P. Pyatakov, A. Bush, B. Ruette, V.I. Belotelov, and A.K. Zvezdin, Induced phase transition in BiFeO3 by high-field electron spin resonance, Ferroelectrics 301, 229-234 (2004).

40. S.A. Zvyagin, A.K. Kolezhuk, J. Krzystek, and R. Feyerherm, Excitation hierarchy of the quantum sine-Gordon spin chain in strong magnetic field, Phys. Rev. Lett. 93, 027201 (2004).

39. J. Krzystek, S.A. Zvyagin, A. Ozarowski, A.T. Fiedler, T.C. Brunold, and J. Telser, Definitive spectroscopic determination of zero-field splitting in high-spin cobalt(II), J. Am. Chem. Soc. 126 (7), 2148-2155 (2004).

38. A. Ozarowski, S.A. Zvyagin, W.M. Reiff, J. Telser, L.-C. Brunel, and J. Krzystek, High-frequency and -field EPR of a pseudo-octahedral complex of high-spin Fe(II): Bis(2,2'-bi-2-thiazoline)bis(isothiocyanato)iron(II), J. Am. Chem. Soc. 126 (21), 6574 – 6575 (2004).

37. K.-Y. Choi, S.A. Zvyagin, G. Cao, and P. Lemmens, Coexistence of dimerization and long-range magnetic order in the frustrated spin-chain system LiCu2O2,: inelastic light scattering study, Phys. Rev. B 69, 104421 (2004).

36. A.E. Kovalev, S.A. Zvyagin, C.R. Bowers, J.L. Reno, and J.A. Simmons, Observation of a node in the quantum oscillations induced by microwave radiation, Solid State Commun. 130, 379 (2004).

35. B. Ruette, S. Zvyagin, A.P. Pyatakov, A. Bush, J.F. Li, J.F., V.I. Belotelov, A.K. Zvezdin, and D. Viehland, Magnetic-field-induced transition in BiFeO3 observed by high-field electron spin resonance: Cycloidal to homogeneous spin order, Phys. Rev. B 69, 064114 (2004)

34. S.A. Zvyagin, J. Krzystek, P.H.M. van Loosdrecht, G. Dhalenne, and A. Revcolevschi, High-field ESR study of the dimerized-incommensurate phase transition in the spin-Peierls compound CuGeO3, Physica B 346-347, 1 (2004).

33. S.A. Zvyagin, J. Krzystek, P.H.M. van Loosdrecht, G. Dhalenne, and A. Revcolevschi, Field-induced structural evolution in the spin-Peierls compound CuGeO3: high-field ESR study, Phys. Rev. B 67, 212403 (2003).

32. S. Zvyagin, B.C. Watson, J.H. Park, D.A. Jensen,, A. Angerhofer, L.C. Brunel, D.R. Talham, and M.W. Meisel, ESR study of (C5H12N)2CuBr4, Physica B 329 1211, 2003.

31. I.B. Rutel, S.A. Zvyagin, J.S. Brooks, J. Krzystek, P. Kuhns, A.P. Reyes, B.H. Ward, J.A. Schlueter, R.W. Winter, and G.L. Gard, High field magnetic resonant properties of beta'-(ET)2SF5CF2SO3, Phys. Rev. B 67, 214417 (2003).

30. S. Zvyagin, G. Cao, Y. Xin, S. McCall, T. Caldwell, W. Moulton, L.-C. Brunel, A. Angerhofer, and J.E. Crow, Dimer liquid state in the quantum antiferromagnet compound LiCu2O2, Phys. Rev. B 66, 064424 (2002).

29. S.A. Zvyagin, G. Cao, L.-C. Brunel, and J. E. Crow, ESR evidence of the quantum spin gap in LiCu2O2, Int. J. Modern Physics B 16, 3373 (2002).

28. S. Zvyagin, G. Cao, L.-C. Brunel, J. Crow, ESR evidence of the quantum spin gap in LiCu2O2, in Physical Phenomena at High Magnetic Fields –IV, ed. by G. Boebinger, Z. Fisk, L.P. Gor’kov, A. Lacerda, and J.R. Schrieffer, World Scientific, 481 (2002).

27. S. Zvyagin, A. Angerhofer, K. Kamenev, L.-C. Brunel, G. Balakrishnan, and D. McK.Paul, Microwave properties of Nd0.5Sr0.5MnO3: a key role of the (x2-y2)-orbital effects, Solid State Comm. 121, 117 (2002).

26. S. Zvyagin, H. Schwenk, B. Lüthi, K.V. Kamenev, G. Balakrishnan, D. McK.Paul, V.I. Kamenev, and Yu.G. Pashkevich, Ultrasonic investigation of Nd0.5Sr0.5MnO3, J. Magn. and Magn. Mat. 226-230, 882 (2001).

25. S. Zvyagin, H. Schwenk, B. Lüthi, K.V. Kamenev, G. Balakrishnan, D. McK.Paul, V.I. Kamenev, and Yu.G. Pashkevich, Ultrasonic and magnetic studies of Nd0.5Sr0.5MnO3, Phys. Rev. B 62, R6104 (2000).

24. M. Orendáč, E. Čizmár, A. Orendáčová, J. Černák, A. Feher, M. W. Meisel, K. A. Abboud, S. Zvyagin, M. Sieling, T. Rieth, and B. Lüthi, Magnetic and thermodynamic properties of Ni(C10H8N2)2Ni(CN)4.·2H2O: an S=1 Heisenberg antiferromagnetic chain with strong in-plane anisotropy and subcritical exchange coupling, Phys. Rev. B 61, 3223 (2000).

23. M. Sieling, U. Löw, B. Wolf, S. Schmidt, S. Zvyagin, and B. Lüthi, High magnetic-field ESR in the Haldane spin chains NENP and NINO, Phys. Rev. B 61, 88 (2000).

22. A. Orendáčová, M. Orendáč, M. Kajnakova, A. Feher, A. Hudak, J. Chernák, J. Kováč, and S. Zvyagin, Magnetic properties of chain-like structures based on Cu(II), Acta Physica Slovaca 49, 473 (1999).

21. M. Orendáč, S. Zvyagin, N. Papanicolaou, A. Orendáčová, M. Sieling, B. Lüthi, A. Feher, and M.W. Meisel, Single-ion bound states in S=1 Heisenberg antiferromagnetic chains with planar anisotropy and subcritical exchange coupling, Phys. Rev. B 60, 4170 (1999).

20. S. Schmidt, B. Wolf, M. Sieling, S. Zvyagin, and B. Lüthi, ESR modes in CsCuCl3 in pulsed magnetic fields, Solid State Comm. 108, 509 (1998).

19. A. Orendáčová, M. Orendáč, A. Feher, S. Zvyagin, M. Sieling, and B. Lüthi, Experimental evidences of one-site two-magnon bound state in S=1 planar Heisenberg chain Ni(C2H8N2)2Ni(CN)4, Acta Physica Slovaca 48, 825 (1998).

18. M. Sieling, T. Rieth, S. Schmidt, B. Lüthi, and S.A. Zvyagin, Magnetic resonance in powder-samples of quasi-one-dimensional anisotropic S=1 spin systems, J. Magn. and Magn. Mat. 177-181, 695 (1998).

17. H. Schwenk, D. König, M. Sieling, S. Schmidt, W. Palme, B. Lüthi, S. Zvyagin, R.S. Eccleston, M. Azuma, and M. Takano, Magnetic resonances in spin ladder systems (VO)2P2O7, SrCu2O3 and Sr2Cu3O5, Physica B 237-238, 115 (1997).

16. H. Schwenk, M. Sieling, D. König, W. Palme, S.A. Zvyagin, B. Lüthi, and R.S. Eccleston, Magnetic resonance and magnetization in the spin ladder compound (VO)2P2O7, Solid State Comm. 100, 381 (1996).

15. S.A. Zvyagin, T. Rieth, M. Sieling, S. Schmidt, and B. Lüthi, Magnetic excitation spectrum in large-D chain NENC, Czechoslovak J. of Physics 46, Suppl. S4, 1937 (1996).

14. S.A. Zvyagin, V.V. Eremenko, V.V. Pishko, A. Feher, M. Orendáč, and A. Orendáčová, Magnetic excitations in Ni(C2H8N2)2Ni(CN)4, Low Temp. Physics 21, 882 (1995).

13. M. Orendáč, A. Orendáčová, A. Feher, J. Chomič, S.A. Zvyagin, V.V. Eremenko, and V.V. Pishko, On the magnetic properties of the low-dimensional magnet Cu(C2H8N2)2Ni(CN)4, J. Magn. and Magn. Mat. 140-145, 1645 (1995).

12. V.V. Eremenko, S.A. Zvyagin, and V.V. Pishko, V.V. Tsapenko, Magnetic excitations in Sm2CuO4, IEEE Trans. on Magnetics 30, 858 (1994).

11. A.G. Anders, S.V. Volotskiy, V.V. Eremenko, S.A. Zvyagin, V.A. Novosad, and V.V. Pishko, Magnetodipole excitations and ground state of the rare-earth ion in Sm2CuO4, Low Temp. Physics 10, 814 (1993).

10. V.A. Blinkin, Yu.G. Pashkevich, V.V. Eremenko, S.A. Zvyagin, and V.V. Pishko, Antiferromagnetic resonance in Nd2Cu04, Sov. J. Low Temp. Physics 18, 848 (1992).

9. V.V. Eremenko, S.A. Zvyagin, V.V. Pishko, S.N. Barilo, and D.I. Zhigunov, Experimental investigation of magnetic resonance in Nd2CuO4, Sov. J. Low Temp. Physics 18, 296 (1992).

8 .V.V. Eremenko, S.A. Zvyagin, V.V. Pishko, Yu.G. Pashkevich, and V.V. Shahov, Resonance properties of four-sublattice antiferromagnetic CuCl2·2H2O, Sov. J. Low Temp. Physics 18, 175 (1992).

7. V.G. Bar’yakhtar, V.V. Eremenko, S.A. Zvyagin, Yu.G. Pashkevich, V.V. Pishko, V.L. Sobolev, and V.V. Shahov, Line width of the magnetic resonance exchange modes in a four-sublattice rhombic antiferromagnet, Sov. Phys. JETP 73, 104 (1991).

6. V.V. Eremenko, S.A. Zvyagin, V.V. Pishko, S.N. Barilo, and D.I. Zhigunov, Observation of magnetic resonance in Pr2CuO4 and Nd2CuO4, JETP Letters 52, 339 (1990).

5. V.G. Baryakhtar, V.V. Eremenko, S.A. Zvyagin, Yu.G. Pashkevich, V.V. Pishko, V.L. Sobolev, and V.V. Shakhov, Exchange spin-wave relaxation in cooper chloride dehydrate, preprint ISC-90-25-Kharkov, Institute for Single Crystals, Kharkov (Ukraine), 1990.

4. V.V. Eremenko, S.A. Zvyagin, Yu.G. Pashkevich, V.V. Pishko, V.L. Sobolev, and S.A. Fedorov, Exchange spin waves and their manifestation in two-magnon absorption and Raman scattering, Journal de Physique 49, c8-913 (1988).

3. V.V. Eremenko, S.A. Zvyagin, Yu.G. Pashkevich, V.V. Pishko, V.L. Sobolev, and V.V. Shahov, Temperature dependence of the frequencies of exchange modes of antiferromagnetic resonance in CuCl2·2H2O, Sov. Phys. Solid State 30, 729 (1988).

2. V.V. Eremenko, S.A. Zvyagin, Yu. G. Pashkevich, V.V. Pishko, V.L. Sobolev, and S.A. Fedorov, Spin wave spectra of multilattice antiferromagnets. Two-magnon absorption on the exchange modes, preprint ITP-86-34P-Kiev, Institute for Theoretical Physics, Kiev, Ukraine (1987).

1. V.V. Eremenko, S.A. Zvyagin, Yu.G. Pashkevich, V.V. Pishko, V.L. Sobolev, and S.A. Fedorov, Two-magnon absorption and characteristics of the spin-wave spectrum of multisublattice antiferromagnets, Sov. Phys. JETP 66, 1184 (1987).