DETI.2 Research highlights and publications

Research: Recent results

  • Anatase and rutile TiO2 thin films:

DETI.2 STO XRD

XRD scans of TiO2 thin films on either fused silica (a)-linear y-scale or SrTiO3(001) single crystals (b)-logarithmic y-scale. For (a), anatase and rutile phases could be achieved by adjusting the growth temperature. The thickness of the films are 360 (anatase) and 390 nm (rutile) on fused silica 290 nm on SrTiO3 (STO). Films have been prepared by reactive magnetron sputtering from a Ti target in a Ar+O2 atmosphere.

  • Magnetic properties of Co or Fe doped TiO2:

Deti.2 _ CoTiO2

Left: Magnetic hysteresis curves for CoxTi1-xO2 films with x= 0.08, 0.004, and 0.001. Right: Electric resistivity dependence of the specific magnetic moment for Co0.0015Ti0.9985O2 and Fe0.001Ti0.999O2 films.

Publications

Important note: Please provide the following acknowledgement in all your publications:

"This work is supported by the Initiative and Networking Fund of the German Helmholtz Association,  Helmholtz-Russia Joint Research Group HRJRG-314, and the Russian Foundation for Basic Research, RFBR #12-02-91321-SIG_а."

2013

  • Conference contributions:
    1.    O. Yildirim, S. Cornelius, M. Vinnichenko, M. Butterling, A. Orlov, A. Wagner, A. Smekhova, and K. Potzger, "Defects in Magnetic TiO2", Abstract Book of European School of Magnetism, 25.2-08.3.2013, Cargese-Corsica, (2013)
    2.    O. Yildirim, S. Cornelius, M. Vinnichenko, M. Butterling, A. Orlov, A. Wagner,  A. Smekhova, and K. Potzger, "Magnetic and Defect Properties of Co Implanted TiO2", Abstract Book of Deutsche Physikalische Gesellschaft Spring Meeting, 11.3-15.3.2013, Regensburg, Germany (2013)
    3.    A. Smekhova, R. Baulin, F. Pankratyev, A. Semisalova, A. Novikov, Yu. Mikhaylovskiy, A.F. Orlov, M. Butterling, O. Yildirim, K. Potzger, “Diluted Magnetic Semiconductors TiO2:Co, TiO2:V and TiO2:Mn : relationship of defects, magnetization and MO properties”, Abstract booklet of the 47th Winter School of PNPI RAS on Condensed Matter Physics “FKS-2013”, Zelenogorsk, St.Petersburg region, Russia, p.153 (2013) poster
    4.    A. Granovsky, A. Orlov, N. Perov, E.Gan’shina, A. Semisalova, A. Smekhova, B.A. Aronzon, V. Rylkov, “Above Room Temperature Ferromagnetism in  Si:Mn,
    TiO2-Co and  TiO2-V”, EMM-FM Program & Abstract Booklet of 2nd Euro-Mediterranean Meeting on Functionalized Materials, 24-28 March 2013, Hammamet, Tunisia, p.15 (2013) invited talk
    6.    A. Smekhova, A. Semisalova, A. Orlov, N. Perov, E. Gan’shina, A. Novikov, Yu. Mikhaylovskiy, K. Potzger, O. Yildirim, M. Butterling, A. Wagner, W. Anwand, A. Granovsky, “Defects in magnetism of diluted magnetic semiconductors TiO2:Co and TiO2:V”, Abstract Book of JEMS’2013, August 25-30, Rhodes, Greece, p.461 (2013) poster
    7.    A. Smekhova, A.S. Semisalova, Yu.O. Mikhailovskiy, A.I. Novikov, A.F. Orlov, N.S. Perov, E.A. Gan’shina, K. Potzger, O. Yildirim, B.A. Aronzon, A.B. Granovsky, “Inequality of Room Temperature Ferromagnetism in TiO2-δ:Co and TiO2-δ:V”, Donostia International Conference on Nanoscaled Magnetism and Applications (DICNMA’2013), September 9-13, San-Sebastian, Spain, p.157 (2013) oral talk
    8.    A Smekhova, E.A. Gan’shina, A. Novikov, A. Semisalova, N. Perov, A. Granovsky, A.F. Orlov, M. Butterling, A.Wagner, W.Anwand, O. Yildirim, K. Potzger, “Diluted magnetic oxides TiO2:Co and TiO2:V : relationship of magnetization, MO properties and defects”, Abstract for V Euro-Asian Symposium “Trends in MAGnetism”: Nanomagnetism. EASTMAG – 2013, September 15-21, Vladivostok, Russia, p.277 (2013) poster
    9.    O. Yildirim, S. Cornelius, M. Vinnichenko, M. Butterling, A. Wagner, A. Smekhova, K. Potzger, “Magnetic and defect-properties of Co implanted TiO2”, Abstract Booklet of International conference on nanoscale magnetism (ICNM), 02-06 September, Istanbul, Turkey, (2013)
    10.    K.Potzger, “Magnetic patterning of B2 materials using ion beams”, Abstract Booklet of International conference on nanoscale magnetism (ICNM), 02-06 September, Istanbul, Turkey, (2013)
  • Publications:
    1.    M. Butterling, W. Anwand, S. Cornelius, K. Potzger, A. Smekhova, M. Vinnichenko, A. Wagner, “Optimization of growth parameters of TiO2 thin films using a slow positron beam”, Journal of Physics: Conference Series, vol. 443 (2013) 012073
    2.    O. Yildirim, M. Butterling, S. Cornelius, Yu. Mikhailovskiy, A.Novikov, A. Semisalova, A. Orlov, E. Gan’shina, N. Perov, W. Anwand, A.Wagner, K. Potzger, A.B. Granovsky and A. Smekhova, “Ferromagnetism and structural defects in V-doped titanium dioxide”, accepted to PSS
    3.    Semisalova, A.; Mikhailovsky, Yu.; Smekhova, A.; Orlov, A; Perov, N.; Gan'shina, E; Lashkul, A.; Lahderanta, E.; Potzger, K.; Yildirim, O.; Aronzon, B.; Granovsky, A., “Inequality of Room Temperature Ferromagnetism in TiO2-:Co and TiO2-:V", submitted to Solid State Phenomenon

2012

  • Conference contributions:

  1. Maik Butterling et al.: "Investigations of defects in magnetic TiO2 using a slow-positron-beam", 16th International Conference on Positron Annihilation (ICPA-16), 19.-24.8. 2012, Bristol
  2. Alevtina Smekhova et al.,  "Ferromagnetic Order in Ti Dioxide with incorporated Vanadium", ETOPIM (Marseille, 2.-7.9.) conference and EMRS conference (Warsaw, 19.-23.9.), 2012
  3. Kay Potzger: "Ion beam based doping and defects for tailoring magnetic properties", PNI  workshop "Magnetism and highly correlated electron systems" (poster), 11.6.-12.6. 2012, Freising

Related literature:

Diploma thesis of Armin Haase