Site-specific magnetic anisotropies in R2Fe14B systems
Site-specific magnetic anisotropies in R2Fe14B systems
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DOI：
10.1063/1.5018875
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发表时间：
2018-04-16
影响因子：
4
通讯作者：
Tsuchiura, H.
中科院分区：
文献类型：
--
作者：
Yoshioka, T.;Tsuchiura, H.
利用第一性原理计算得到的信息，建立了R2Fe 14 B（R = Dy，Ho）系统的微观有效自旋模型，研究了R离子的局域磁各向异性.考虑到6阶晶体电场参数，该模型满意地描述了所观察到的磁化曲线和各向异性常数的温度依赖性。我们发现，在低温下，非共线结构出现在Ho_2Fe_（14）B系统中，反映了局部磁各向异性。由AIP出版社出版。
The local magnetic anisotropy of R ions in R2Fe14B (R = Dy, Ho) systems is studied based on a microscopic effective spin model constructed from the information obtained by using first-principles calculations. By taking into account up to 6-th order crystal electric field parameters, the model satisfactory describes the observed magnetization curves and the temperature dependence of anisotropy constants. We found that at low temperatures, the noncollinear structure appears in the Ho2Fe14B system reflecting the local magnetic anisotropy. Published by AIP Publishing.