SURFACE-POLARITONS ON ANTIFERROMAGNETIC SUPERLATTICES

被引:41
作者
ALMEIDA, NS [1 ]
TILLEY, DR [1 ]
机构
[1] UNIV ESSEX,DEPT PHYS,COLCHESTER CO4 3SQ,ESSEX,ENGLAND
关键词
Magnetic Materials - Antiferromagnetism;
D O I
10.1016/0038-1098(90)90007-X
中图分类号
O469 [凝聚态物理学];
学科分类号
070205 ;
摘要
The effective-medium theory of magnetic superlattices is applied to uniaxial antiferromagnets without an external field. The effective magnetic permeability tensor is then diagonal but anisotropic. a surface polariton exists on a semi-infinite antiferromagnet/non-magnet superlattice; it has a magnetostatic limit if f1> 1 2, where f1 is the proportion of antiferromagnet, but is a virtual mode qithout a magnetostatic limit of f1 < 1 2. Calculations of attenuated-total-reflection spectra for the FeF2/ZnF2 system indicate that the surface polariton should be observable by this means. © 1990.
引用
收藏
页码:23 / 27
页数:5
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