Journal of Experimental and Theoretical Physics

, Volume 87, Issue 1, pp 146–151

Magnetoelectric effect and toroidal ordering in Ga2−xFexO3

Authors

  • Yu. F. Popov
    • M. V. Lomonosov Moscow State University
  • A. M. Kadomtseva
    • M. V. Lomonosov Moscow State University
  • G. P. Vorob’ev
    • M. V. Lomonosov Moscow State University
  • V. A. Timofeeva
    • M. V. Lomonosov Moscow State University
  • D. M. Ustinin
    • M. V. Lomonosov Moscow State University
  • A. K. Zvezdin
    • Institute of General PhysicsRussian Academy of Sciences
  • M. M. Tegeranchi
    • Institute of General PhysicsRussian Academy of Sciences
Solids

DOI: 10.1134/1.558635

Cite this article as:
Popov, Y.F., Kadomtseva, A.M., Vorob’ev, G.P. et al. J. Exp. Theor. Phys. (1998) 87: 146. doi:10.1134/1.558635

Abstract

The field dependence of the magnetoelectric effect and longitudinal magnetostriction of Ga2−xFexO3 single crystals is studied in magnetic fields up to 200 kOe in the temperature range from 4.2 to 300 K. It is shown that the magnetoelectric effect in these materials is determined mainly by the toroidal moment T and is not related to magnetostriction, as was previously theorized. A new method for determining the toroidal moment by measuring the electric polarization in a strong magnetic field is proposed. The value of the toroidal moment of the unit cell in Ga1.15Fe0.85O3 is calculated: T=(Ta,0,0), where Ta=24.155µB Å per unit cell. Experimental data are analyzed using a theory of toroidal spin ordering, which gives good agreement with experiment.

Copyright information

© American Institute of Physics 1998