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Magnetic Properties of Heteroepitaxial MnAs Thin Films and Their Post-growth Annealing Effects
被引:0
|作者:
Song, J. H.
[1
]
Ketterson, J. B.
[2
,3
]
机构:
[1] Chungnam Natl Univ, Dept Phys, Daejeon 305764, South Korea
[2] Northwestern Univ, Dept Phys & Astron, Evanston, IL 60208 USA
[3] Northwestern Univ, Mat Res Ctr, Evanston, IL 60208 USA
来源:
关键词:
MnAs;
spin polarization;
spin injection;
ferromagnetism;
D O I:
暂无
中图分类号:
O59 [应用物理学];
学科分类号:
摘要:
We have studied physical properties of MnAs thin films grown by Molecular-Beam Epitaxy as well as their postgrowth annealing effects. The samples grown at 600 degrees C show the preferred crystal orientation of type-B independent of substrate whereas type-A is observed for the samples grown at below 200 degrees C. The sample grown at 600 degrees C on GaAs(001) substrate is magnetized to only one direction even on the easy axis of magnetization. The magnetic properties are vastly enhanced after post- growth annealing for both MnAs/Si(001) sample with no ferromagnetism and ferromagnetic MnAs/GaAs(001) grown at 200 degrees C.
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页码:126 / 132
页数:7
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