Spin Structures of Quasi-Two-Dimensional Isotropic-and Anisotropic-Antiferromagnetic Heisenberg Models on an hcp Lattice
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概要
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Spin structures of quasi-two-dimensional isotropic and anisotropic antiferromagnetic Heisenberg models on a hexagonal close-packed (hcp) lattice are analyzedby using a mean field theory and studied by using a Monte Carlo method. In anisotropic and an xy-like models, an incommensuraLe (IC) phasc occurs at low temperalures and a phase transition between the IC phase and the paramagnetic phase is ofthe first order. In an Ising-like model, a special pararnagnetic phase occurs at intermediate temperatures where an IC short range order develops much. As the temperature is decreased, an IC long range order occurs when the anisotropy is small,whereas a non-periodic frozeut phase occurs when the anisotropy is large. Commentson recent experiments on Limit. and NaTi0. are given.
- 社団法人日本物理学会の論文
- 1987-11-15
著者
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INAWASHIRO Sakari
Department of Computer Science, Nihon University
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Matsubara Fumitaka
Department Of Applied Physics Faculty Of Engineering The University Of Tohoku
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Matsubara Fumitaka
Department Of Engineering Science Tohoku University
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Inawashiro Sakari
Department Of Applied Physics Faculty Of Engineering Toyoku University
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