Coercivity exceeding 100 kOe in epitaxially grown FePt sputtered films

被引:216
作者
Shima, T [1 ]
Takanashi, K
Takahashi, YK
Hono, K
机构
[1] Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan
[2] Natl Inst Mat Sci, Tsukuba, Ibaraki 3050047, Japan
关键词
D O I
10.1063/1.1794863
中图分类号
O59 [应用物理学];
学科分类号
摘要
Microstructure and magnetization processes of highly ordered FePt (001) films with large perpendicular magnetic anisotropy have been studied. The film morphology was controlled from assemblies of single-domain nanoparticles to those of multidomain islands by varying the nominal thickness (t(N)) of the FePt films sputter-deposited on a heated MgO (001) substrate. The change in the magnetization process from magnetization rotation to domain wall displacement is clearly demonstrated by the initial magnetization curves. Huge coercivities as high as 70 and 105 kOe have been achieved in the film with single-domain particles at room temperature and 4.5 K, respectively. (C) American Institute of Physics.
引用
收藏
页码:2571 / 2573
页数:3
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