| 具有次近邻相互作用的面心立方格子的Ising(自旋S=1)反铁磁薄膜在外场下的基态自旋结构 |
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| 引用本文： | 杨瑞青,熊诗杰.具有次近邻相互作用的面心立方格子的Ising(自旋S=1)反铁磁薄膜在外场下的基态自旋结构[J].南京大学学报(自然科学版),1987(2). |
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| 作者姓名： | 杨瑞青 熊诗杰 |
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| 作者单位： | 南京大学固体物理研究所，南京大学固体物理研究所 |
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| 摘 要： | 将文献5]的方法推广到反铁磁薄膜,变S=1的Ising体系成一个粒子数不守恒的费米体系,严格得到fcc格子的反铁磁薄膜在外场下的基态,并给出了其交换积分在一定范围内的零温相图。从中可见其自旋状态与大块铁磁体的差别,表面自旋排列存在与内部不同的方式。这是由于系统不再具有垂直于表面方向的平移对称性而产生的非均匀效应。
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| 关 键 词： | 反铁磁薄膜 相图 非均匀 |
THE CROUND STATE OF ISINC SPIN S=1 MODEL OF A FCC LATTICE ANTIFERROMACNETIC THIN FITM WITH NEXT NEAREST NEICHBORS INTERACTION IN AMMACNETIC FIELD |
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| Yang Ruiqing Xiong Shijie.THE CROUND STATE OF ISINC SPIN S=1 MODEL OF A FCC LATTICE ANTIFERROMACNETIC THIN FITM WITH NEXT NEAREST NEICHBORS INTERACTION IN AMMACNETIC FIELD[J].Journal of Nanjing University: Nat Sci Ed,1987(2). |
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| Authors: | Yang Ruiqing Xiong Shijie |
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| Institution: | Yang Ruiqing Xiong Shijie |
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| Abstract: | We generalize the method of refernce5]to the antiferromagnetic thin film. Introducing the transformation from Ising spin S=1 systems to aFermion system in which the total number of particles is not a constant, we obtain rigorously the ground state energy of the antiferromagnetic thin film of Ising S=1 fcc lattice and its equilibrium phase diagrams at T=OK within some bounds of the exchange integrals. From the results we find the differences between the antiferromgnetic thin film and the bulk antiferromanet, the different spin configrations between the surface and interlayer. These are nonuniform effects due to the system no longer having the translational symmetry in the direction perpendicular to the surface. |
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| Keywords: | the antiferromagnetic thin film Phase diagrams nonuniform effects |
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