Abstract The internal energy and specific heat of a Heisenberg ferro- antiferromagnetic double-layer system are studied by using spin-wave theory and the retarded Green function method at low temperatures. Numerical results show that the antiferromagnetic intralayer coupling $J_2 $ has an important influence on internal energy and specific heat for a four-sublattice system with antiferromagnetic (or ferrimagnetic) interlayer couplings.
(Magnetic properties of interfaces (multilayers, superlattices, heterostructures))
Fund: Project supported by the Natural Science Foundation of Liaoning
Province (Grant No~20041021), the Scientific Foundation of the Educational
Department of Liaoning Province (Grant No 2004C006) and the Postdoctoral
Foundation of Shenyang University of Techn
Cite this article:
Jiang Wei(姜伟) and Guo An-Bang(国安邦) Internal energy and specific heat in a ferromagnetic- antiferromagnetic double layers 2007 Chinese Physics 16 3832
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