Magnetism

Magnetoelectric properties of samarium iron garnet

D. I. Plokhov^ab, A. I. Popov^c, A. K. Zvezdin<sup>ad

a</sup> Prokhorov General Physics Institute of the Russian Academy of Sciences, Moscow
^b Peoples' Friendship University of Russia named after Patrice Lumumba, Moscow, Russia
^c National Research University of Electronic Technology (MIET), Zelenograd, Russia
^d P. N. Lebedev Physical Institute, Russian Academy of Sciences, Moscow

Abstract: The magnetoelectricity of samarium iron garnet is theoretically investigated: the antiferroelectric structures of samarium ions are described and their connection with the configurations of the magnetic moments of the ions and their transformations during magnetic phase transitions is revealed. The possibility of the appearance at low temperatures of unusual Bloch domain walls, in which the magnetization vector rotates from the [$u$ $v$ 0] axes to the [$v$ $u$ 0] axes, which are not crystal symmetry axes, is established. The electric polarization of Bloch domain walls, which are realized both at low ($T\to0$ K) and high temperatures, is studied. It has been established that the electric polarization of Bloch boundaries, which arises because of an inhomogeneous magnetoelectric effect, depends significantly on their shape.

Keywords: rare-earth iron garnets, magnetic phase transitions, Bloch domain walls, inhomogeneous magnetoelectric effect.

Received: 29.12.2022
Revised: 30.12.2022
Accepted: 30.12.2022

DOI: 10.21883/FTT.2023.03.54742.561

Bibliographic databases:

•