NUCLEAR FERROMAGNETIC AND ANTIFERROMAGNETIC EXCHANGE IN THIN-FILMS OF HE-3 ADSORBED ON GRAPHITE

被引：38
作者：
LUSHER, CP
SAUNDERS, J
COWAN, BP
机构：
[1] Department of Physics, Royal Holloway and Bedford New College University of London, Egham, Surrey
来源：
EUROPHYSICS LETTERS | 1991年 / 14卷 / 08期
关键词：
FILMS (INC PHYSICAL ADSORPTION); MAGNETIC PROPERTIES AND NUCLEAR MAGNETIC RESONANCE;
D O I：
10.1209/0295-5075/14/8/015
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Measurements of the nuclear magnetic susceptibility of multilayer films of He-3 adsorbed on graphite plated with a monolayer of He-4 are reported for He-3 surface densities up to 0.27 angstrom-2 and temperatures in the range (6 divided-by 600)mK. The coverage dependence of the exchange constant has been measured; this is antiferromagnetic when the second layer first solidifies and becomes ferromagnetic with the formation of a fluid overlayer. The second-layer solid density evolves in a stepwise fashion with increasing coverage, while the susceptibility of the fluid overlayer shows structure associated with layering in the film.
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页码：809 / 814
页数：6
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