Impurity Effects on Two-Dimensional Anisotropic Heisenberg Antiferromagnets.
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- Kawashima Takashi
- Department of Physics, Dokkyo University School of Medicine, Mibu, Tochigi 321–02
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- Oguchi Akihide
- Department of Physics, Faculty of Science and Technology, Science University of Tokyo, Noda, Chiba 278
Bibliographic Information
- Other Title
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- Impurity Effects on Two Dimensional Ani
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Description
We study magnetic behavior of a completely random dilute S=1/2 anisotropic Heisenberg antiferromagnet on the two-dimensional square lattice by using the coherent potential approximation. In the anisotropic Heisenberg model, the xy-anisotropy defined by Jp(z)/Jp(xy) is enhanced with increasing nonmagnetic impurities, where Jp(z) and Jp(xy) are the z and xy components of the coherent exchange constant, respectively. On the other hand, the isotropic Heisenberg model retains the isotropic nature for any impurity concentration. The critical concentration at the percolation threshold is obtained. The Néel temperature and the magnitude of the coherent exchange constant are calculated as a function of the impurity concentration.
Journal
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- Journal of the Physical Society of Japan
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Journal of the Physical Society of Japan 63 (5), 1908-1915, 1994
THE PHYSICAL SOCIETY OF JAPAN
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Details 詳細情報について
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- CRID
- 1390282679158558592
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- NII Article ID
- 110001977494
- 210000098030
- 130004535020
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- NII Book ID
- AA00704814
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- BIBCODE
- 1994JPSJ...63.1908K
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- ISSN
- 13474073
- 00319015
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- NDL BIB ID
- 3875215
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed