Magnetoelectric effect and toroidal ordering in Ga2−x FexO3
- 1 July 1998
- journal article
- Published by Pleiades Publishing Ltd in Journal of Experimental and Theoretical Physics
- Vol. 87 (1) , 146-151
- https://doi.org/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.Keywords
This publication has 9 references indexed in Scilit:
- Toroidal order in crystalsFerroelectrics, 1994
- Etude cristallographique du compose FexGa2−xO3 par neutrons polarisesJournal of Physics and Chemistry of Solids, 1967
- Magnetization and Anisotropy in Gallium Iron OxideJournal of Applied Physics, 1966
- Linear Magnetoelectric Effects in Gallium Iron Oxide at Low Temperatures and in High Magnetic FieldsJournal of Applied Physics, 1966
- Crystal Structure of Piezoelectric Ferromagnetic Gallium Iron OxideThe Journal of Chemical Physics, 1965
- Observation and Possible Mechanisms of Magnetoelectric Effects in a FerromagnetPhysical Review Letters, 1964
- Magnetism of Piezoelectric Ga2−xFexO3Journal of Applied Physics, 1963
- The unit cell and space group of gallium iron oxide, a piezoelectric ferromagnetic crystalActa Crystallographica, 1960
- GaFeO 3 : A Ferromagnetic-Piezoelectric CompoundJournal of Applied Physics, 1960