Effect of atomic modulation on the J-mixing-dominant magnetic anisotropy in SmFe7 epitaxial films

被引：3
|
作者：
Kusumori, Takeshi [1 ]
Fujita, Asaya [1 ]
Mibu, Ko [2 ]
机构：
[1] Natl Inst Adv Ind Sci & Technol, Chubu Ctr, Nagoya, Aichi 4638560, Japan
[2] Nagoya Inst Technol, Grad Sch Engn, Nagoya, Aichi 4668555, Japan
来源：
APPLIED PHYSICS EXPRESS | 2016年 / 9卷 / 04期
关键词：
CRYSTAL-FIELD PARAMETERS; SM-FE-N; INTERMETALLIC COMPOUNDS; SM2CO17;
D O I：
10.7567/APEX.9.043001
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The magnetocrystalline anisotropy in TbCu7-type SmFe7 epitaxial films has been verified in relation to the 4f-electron character. The reinforcement of the 4f intermultiplet mixing by nitrogenation is verified from an enlarged basal-plane anisotropy. The sign of the uniaxial anisotropy constant is varied from positive to negative by nitrogenation, in contradiction to behaviors in Th2Zn17-type Sm2Fe17Nx. Fe-57 Mossbauer spectroscopy and first-principles calculation revealed that the transformation of the Sm-neighboring Fe-atom plane from a rippling to a flat shape, which characterizes the Th2Zn17- and TbCu7-type local structures, markedly modulates the magnetic anisotropy, owing to the 4f semilocalized character. (C) 2016 The Japan Society of Applied Physics
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页数：4
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