ENERGY GAPS IN THE SPIN-WAVE DISPERSION OF THE LINEAR ANTI-FERROMAGNET TMMC

被引：26

作者：

HEILMANN, IU

BIRGENEAU, RJ

ENDOH, Y

REITER, G

SHIRANE, G

HOLT, SL

机构：

[1] MIT,DEPT PHYS,CAMBRIDGE,MA 02139

[2] UNIV WYOMING,DEPT CHEM,LARAMIE,WY 82070

来源：

SOLID STATE COMMUNICATIONS | 1979年 / 31卷 / 09期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/0038-1098(79)90307-7

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

By means of neutron scattering, we have measured magnetic excitations in the linear-chain antiferromagnet TMMC at T =1.8 K. An energy gap is observed at q=0 associated with zz-spin correlations, thus giving direct evidence for the importance of the dipolar xy anisotropy for the spin dynamics at low temperatures. A finite magnetic field applied perpendicular to the chains creates a second q=0 gap. There are substantial discrepancies between field dependence of the spin-wave dispersion and the predictions of linear spin-wave theory. © 1979.

引用

页码：607 / 610

页数：4

共 17 条

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