Magnetic phase transitions and microwave absorption in rare-earth-iron garnet

被引：2

作者：

Lagutin, AS

Safonov, VL

机构：

[1] Institute of Molecular Physics, Russian Research Center, Kurchatov Institute

来源：

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 1997年 / 171卷 / 03期

关键词：

ferrimagnet; magnetic resonance; relaxation; microwave absorption; Ising ions;

D O I：

10.1016/S0304-8853(97)00077-2

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A microscopic theoretical model is considered to explain the dynamic properties of magnetic system of Ho0.4Y2.6Fe5O12 The model hamiltonian contains the exchange interaction between the iron spins, the antiferromagnetic exchange interaction between the iron spins and the rare-earth Ising spins and the Zeeman energy. The experimentally observed anomalies of magnetic resonance are found to appear due to strong fluctuations of the rare-earth Ising spins and their maximal spin-lattice relaxation in the vicinity of magnetic phase transition.

引用

页码：336 / 340

页数：5