Spin excitation spectrum of La(1-x)A(x)MnO(3)

被引：135

作者：

Furukawa, N

机构：

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 1996年 / 65卷 / 05期

关键词：

perovskite-type manganate; LaMnO3; double-exchange model; Kondo lattice model; metallic ferromagnetism; spin wave;

D O I：

10.1143/JPSJ.65.1174

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

As an effective model to describe the perovskite-type manganates (La,A)MnO3, the double-exchange model (the Kondo lattice model with ferromagnetic couplings) on a cubic lattice is investigated. The spin excitation spectrum of the model in the ground state is studied using the spin wave approximation. The spin wave dispersion relation observed in the inelastic neutron scattering experiment for La0.7Pb0.3MnO3 is reproduced. Effective values for the electron bandwidth as well as Hund's coupling are estimated from the data.

引用

页码：1174 / 1177

页数：4