Heat capacity study of the quantum antiferromagnetism of a He-3 monolayer

被引：43

作者：

Siqueira, M

Nyeki, J

Cowan, B

Saunders, J

机构：

[1] Millikelvin Laboratory, Department of Physics, Royal Holloway University of London, Egham, Surrey

来源：

PHYSICAL REVIEW LETTERS | 1996年 / 76卷 / 11期

关键词：

D O I：

10.1103/PhysRevLett.76.1884

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have measured the heat capacity of the second layer solid in a He-3 film adsorbed on the surface of graphite to temperatures below 1 mK, in the regime where the nuclear exchange interaction is antiferromagnetic. The temperature dependence of the data is described by high temperature series expansions for a 2D Heisenberg antiferromagnet on a triangular lattice. There is no evidence for a phase transition down to J/3. Comparison with J inferred from the magnetization provides a measure of the frustration due to competing antiferromagnetic and ferromagnetic cyclic exchanges.

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页码：1884 / 1887

页数：4

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