The effect of coherent uniaxial anisotropies on the grain-size dependence of coercivity in nanocrystalline soft magnetic alloys
The effect of coherent uniaxial anisotropies on the grain-size dependence of coercivity in nanocrystalline soft magnetic alloys
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DOI：
10.1016/s0304-8853(97)00987-6
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发表时间：
1998
影响因子：
2.7
通讯作者：
Kiyonori Suzuki;G. Herzer;J. Cadogan
中科院分区：
文献类型：
--
作者：
Kiyonori Suzuki;G. Herzer;J. Cadogan
本文重新分析了各种纳米晶软磁材料的矫顽力与晶粒尺寸的关系，特别注意了诱导单轴各向异性。除了众所周知的D6定律外，在一些单轴各向异性大于随机磁晶各向异性（ε K 1 ε）的纳米晶样品中观察到Hcis的D3依赖性。本文将原有的随机各向异性模型推广到宏观单轴各向异性大于K1的情况。因此，扩展模型预测的D3依赖的HC和解释所观察到的晶粒尺寸依赖性相当好。
The grain-size (D) dependence of coercivity (Hc) in various nanocrystalline soft magnetic materials has been re-analyzed with particular attention to induced uniaxial anisotropies. In addition to the well-known D6law, a D3dependence of Hcis observed for some nanocrystalline samples with uniaxial anisotropies larger than the random magnetocrystalline anisotropy (〈K1〉). The original random anisotropy model has been extended to the case where the macroscopic uniaxial anisotropies dominate over 〈K1〉. As a result, the extended model predicts a D3dependence of Hcand explains the observed grain-size dependence quite well.