Magnetoelectric effect and toroidal ordering in Ga2-xFexO3

被引：79

作者：

Popov, YF ^{[1
]}

Kadomtseva, AM

Vorob'ev, GP

Timofeeva, VA

Ustinin, DM

Zvezdin, AK

Tegeranchi, MM

机构：

[1] Moscow MV Lomonosov State Univ, Moscow 119899, Russia

[2] Russian Acad Sci, Inst Gen Phys, Moscow 117942, Russia

来源：

JOURNAL OF EXPERIMENTAL AND THEORETICAL PHYSICS | 1998年 / 87卷 / 01期

关键词：

Spectroscopy; Experimental Data; Magnetic Field; State Physics; Field Theory;

D O I：

10.1134/1.558635

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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 = (T-a, 0, 0), where T-a = 24.155 mu(B) Angstrom per unit cell. Experimental data are analyzed using a theory of toroidal spin ordering, which gives good agreement with experiment. (C) 1998 American Institute of Physics.

引用

页码：146 / 151

页数：6

共 21 条

[1] CRYSTAL STRUCTURE OF PIEZOELECTRIC FERROMAGNETIC GALLIUM IRON OXIDE [J].