Antiferromagnetic resonance in the hexagonal YMnO3


Antiferromagnetic resonance in the hexagonal YMnO3

Zvyagin, S. A.; Ozerov, M.; Kamenskii, D.; Wosnitza, J.; Ciznar, E.; Kolzhuk, A. K.; Smirnov, D.; Zhou, H. D.; Wiebe, C. R.

Multiferroic rare-earth manganites have attracted much attention because of the coexistence of ferroelectric and magnetic orders. Geometrical frustrations appear to be one of the most important factors contributing to the multiferroicity. Combining conventional far-infrared Fourier-transform and multi-frequency electron spin resonance (ESR) spectroscopy techniques, magnetic excitations in hexagonal multiferroic YMnO3 in the antiferromagnetically (AFM) ordered phase have been studied. The gap in the excitation spectrum, about 42 cm-1, has been observed directly. A fine structure of AFM resonance absorption was revealed by means of ESR, which can be explained taking into account a finite interaction between the neighboring Mn3+ layers. Our observations has allowed us to refine spin-Hamiltonian parameters, emphasizing the role of interlayer interactions in this frustrated compound.

  • Invited lecture (Conferences)
    2. Estonian-German Workshop, 20.-23.05.2009, Cottbus, Deutschland

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Publ.-Id: 12991