SPIN DYNAMICS IN ND2CUO4 AND PR2CUO4

被引：27

作者：

IVANOV, AS ^{[1
]}

BOURGES, P ^{[1
]}

PETITGRAND, D ^{[1
]}

ROSSATMIGNOD, J ^{[1
]}

机构：

[1] IV KURCHATOV ATOM ENERGY INST,RUSSIAN RES CTR,MOSCOW 123182,RUSSIA

来源：

PHYSICA B | 1995年 / 213卷

关键词：

D O I：

10.1016/0921-4526(95)00061-D

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

The low-energy part of the copper spin-wave excitation spectrum in the undoped antiferromagnets Nd2CuO4 and Pr2CuO4 has been studied by inelastic neutron scattering. In Nd2CuO4, magnetic scattering observed around the (1/2 1/2 Q) rod exhibits pronounced energy gaps for both the ''in-plane'' and ''out-of-plane'' spin fluctuations over the whole Brillouin zone. The two gaps appear to be dispersionless along the tetragonal axis direction and remarkably increase when temperature decreases. In Pr2CuO4, the spin-wave gaps are also observed with smaller energies at low temperatures.

引用

页码：60 / 62

页数：3

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