Magnetic-Shape Anisotropy in Polygonal Prisms
Magnetic-Shape Anisotropy in Polygonal Prisms
复制标题
多棱柱中的磁形状各向异性
DOI：
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发表时间：
1968
期刊：
影响因子：
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通讯作者：
E. Gyorgy
中科院分区：
文献类型：
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作者：
F. Hagedorn;E. Gyorgy
结果表明，只有一个单轴磁形状各向异性可以表现出由任意形状的物体，如果施加的磁场（H）是足够大，使磁化均匀的整个样品。因此，正方形板围绕垂直于板的轴是各向同性的，但围绕任何其他轴是单轴的。本文的目的是强调这方面的形状各向异性非常高的领域和说明的各向异性，这是实验观察到的几个多边形棱镜使用典型的实验室值H。两个有趣的例子是从薄板上切下的等边三角形和正方形，当在板的平面内用H测量时，分别产生sin 6 θ和sin 4 θ的扭矩曲线。它还表明，一个立方体的易轴是立方体的边缘小于约6Bs的字段，但成为面对对角线较大的字段。对于薄的正方形板，易轴是对角线的领域小于约11Bs，但方形边缘的LA…
It is shown that only a uniaxial magnetic shape anisotropy can be exhibited by a body of arbitrary shape if the applied magnetic field (H) is large enough to make the magnetization uniform throughout the sample. A square plate will accordingly be isotropic around an axis perpendicular to the plate but uniaxial around any other axis. The purpose of this paper is to emphasize this aspect of shape anisotropy for very high fields and to illustrate the anisotropies which are observed experimentally for several polygonal prisms using typical laboratory values of H. Two interesting examples are equilateral triangles and squares cut from thin plates, which when measured with H in the plane of the plates, yield torque curves of sin6θ and sin4θ, respectively. It is also demonstrated that the easy axes for a cube are the cube edges for fields less than about 6Bs but become face diagonals for larger fields. For thin square plates, the easy axes are diagonals for fields less than about 11Bs but are square edges for la...