Internal energy and specific heat in a ferromagnetic-antiferromagnetic double layers

• 来源期刊: 中国物理B（英文版）
• 关键词: spin-wave theory ferromagnetic-antiferromagnetic double layers internal energy,specific heat
• 年，卷（期）: 2007,（12）
• 页码范围: 3832-3836
• 页数: 5页
• 语种: 英文

摘要

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 J2 has an important influence on internal energy and specific heat for a four-sublattice system with antiferromagnetic (or ferrimagnetic) interlayer couplings.