Quantum theory of magnetoelectricity in rare-earth multiferroics: Nd, Sm, and Eu ferroborates

被引：55
|
作者：
Popov, A. I. [1 ,2 ]
Plokhov, D. I. [1 ]
Zvezdin, A. K. [1 ,3 ]
机构：
[1] Russian Acad Sci, AM Prokhorov Gen Phys Inst, Moscow 119991, Russia
[2] Natl Res Univ Elect Technol, Moscow 124498, Russia
[3] Moscow Inst Phys & Technol, Dolgoprudnyi 141700, Moscow Region, Russia
来源：
PHYSICAL REVIEW B | 2013年 / 87卷 / 02期
基金：
俄罗斯基础研究基金会;
关键词：
D O I：
10.1103/PhysRevB.87.024413
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The quantum theory of magnetoelectricity in rare-earth ferroborates is developed. It is shown that the electric polarization in the materials is induced by means of two single-ion mechanisms: effective magnetic and crystal fields produce the electric dipole moment directly in the electronic 4f shells of rare-earth ions (the electronic contribution) and also through displacement of oppositely charged ion sublattices (the ionic one). The magnetoelectrical properties are described in detail for the neodymium, samarium, and europium ferroborates. In particular, the field and temperature dependencies of polarization are obtained.
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页数：7
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