| Investigation of ultra—thin ferromagnetic films with a simple cubic lattice |
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| 引用本文： | 王怀玉,周云松,王崇愚,D. L. Lin.Investigation of ultra—thin ferromagnetic films with a simple cubic lattice[J].中国物理 B,2002,11(2):167-173. |
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| 作者姓名： | 王怀玉 周云松 王崇愚 D. L. Lin |
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| 作者单位： | (1)Department of Physics, Capital Normal University, Beijing 100037, China; (2)Department of Physics, State University of New York at Buffalo, Buffalo, NY 14260-1500, USA; (3)Department of Physics, Tsinghua University, Beijing 100084, China |
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| 基金项目： | Project supported by the National Natural Science Foundation of China (Grant No. 59971041) and by the National "Climbing" Programme of China (Grant No. G2000067102). |
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| 摘 要： | Using Green‘s function method,we investigate ferromagnetic films with a simple cubic lattice containing up to ten monolayers.The Hamiltonian includes the Heisenberg exchange term,surface anisotropy (SA) and dipole interaction (DI).We calculate the magnetization as a function of temperature and film thickness,and we analyse the behaviour of spin canting.The result is in agreement with experiments.We calculate phase diagrams of SA versus DI to show the conditions under which spontaneous magnetization can occur.As a special case,we discuss the Heisenberg model without SA and DI.
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| 关 键 词： | 铁磁薄膜 单立晶格 格林函数方法 |
| 收稿时间： | 7/2/2001 12:00:00 AM |
Investigation of ultra-thin ferromagnetic films with a simple cubic lattice |
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| Wang Huai-Yu,Zhou Yun-Song,Wang Chong-Yu and D. L. Lin.Investigation of ultra-thin ferromagnetic films with a simple cubic lattice[J].Chinese Physics B,2002,11(2):167-173. |
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| Authors: | Wang Huai-Yu Zhou Yun-Song Wang Chong-Yu and D L Lin |
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| Institution: | Department of Physics, Tsinghua University, Beijing 100084, China; Department of Physics, Capital Normal University, Beijing 100037, China; Department of Physics, State University of New York at Buffalo, Buffalo, NY 14260-1500, USA |
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| Abstract: | Using Green's function method, we investigate ferromagnetic films with a simple cubic lattice containing up to ten monolayers. The Hamiltonian includes the Heisenberg exchange term, surface anisotropy (SA) and dipole interaction (DI). We calculate the magnetization as a function of temperature and film thickness, and we analyse the behaviour of spin canting. The result is in agreement with experiments. We calculate phase diagrams of SA versus DI to show the conditions under which spontaneous magnetization can occur. As a special case, we discuss the Heisenberg model without SA and DI. |
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| Keywords: | ferromagnetic film spin canting Green's function method |
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