Direct imaging and determination of the uncompensated spin density in exchange-biased CoO/(CoPt) multilayers

被引：102
作者：
Kappenberger, P
Martin, S
Pellmont, Y
Hug, HJ
Kortright, JB
Hellwig, O
Fullerton, EE
机构：
[1] Univ Basel, Inst Phys, CH-4056 Basel, Switzerland
[2] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Sci Mat, Berkeley, CA 94720 USA
[3] Hitachi Global Storage Technol, San Jose Res Ctr, San Jose, CA 95120 USA
来源：
PHYSICAL REVIEW LETTERS | 2003年 / 91卷 / 26期
关键词：
D O I：
10.1103/PhysRevLett.91.267202
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Magnetic force microscopy (MFM) measurements were performed on an exchange-biased CoO/(CoPt) multilayer sample at 7.5 K. Applying an external magnetic field of up to 7 T saturates the ferromagnetic layer and the remaining uncompensated antiferromagnetic spins at the antiferromagnet-ferromagnet interfaces are imaged with high lateral resolution. The coupling between the uncompensated spins and the spins in the ferromagnet are found to be antiferromagnetic. Quantitative analysis of the MFM images revealed that 7% of the spins at the interface are uncompensated and contribute to the exchange biasing.
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页数：4
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