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Critical Point of Ising Films with Different Growth Directions |
| WANG Huai-yu1;ZHOU Yun-song2;D.L.Lin3 |
| 1Department of Physics, Yantai University, Yantai 264005
2Department of Physics, Capital Normal University, Beijing 100037
3Department of Physics, State University of New York at Buffalo, Buffalo, NY 14260-1500, U.S.A.
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| Cite this article: |
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WANG Huai-yu, ZHOU Yun-song, D.L.Lin 2000 Chin. Phys. Lett. 17 55-57 |
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Abstract The critical temperature Tc of a spin-1/2 Ising film of cubic structures is calculated by the variational cumulant expansion method for three directions of growth. The results from different growth directions are analysed and compared with each other. In the present model, the Tc values depend largely on the number of nearest neighbors in a monolayer for films with the same number of monolayers but grown in different directions. For sc, bcc and fcc structures, the highest Tc is found along the (100), (110), and (111) direction, respectively.
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| Keywords:
75.70.-i
75.40.-s
05.70.Jk
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Published: 01 January 2000
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| PACS: |
75.70.-i
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(Magnetic properties of thin films, surfaces, and interfaces)
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75.40.-s
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(Critical-point effects, specific heats, short-range order)
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05.70.Jk
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(Critical point phenomena)
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