Near-surface magnetic properties of CoFeAlO thin films

被引:5
|
作者
Ha, ND
Thanh, NT
Kim, HB
Kim, CG
Kim, CO
Gan'shina, E
Phan, MH
机构
[1] Univ Bristol, Dept Aerosp Engn, Bristol BS8 1TR, Avon, England
[2] Chungnam Natl Univ, Dept Mat Engn, Taejon 305765, South Korea
[3] Minist Ind, Res Inst Technol Machinery, Hanoi, Vietnam
[4] Chungnam Natl Univ, Res Ctr Adv Magnet Mat, Taejon 305765, South Korea
[5] Moscow MV Lomonosov State Univ, Fac Phys, Moscow 119992, Russia
关键词
Co-Fe-Al-O thin films; Kerr effect; magneto-optics; surface anisotropy;
D O I
10.1016/j.ssc.2005.06.002
中图分类号
O469 [凝聚态物理学];
学科分类号
070205 ;
摘要
We present here, the results of a thorough study of the surface and magnetic properties of as-deposited and annealed Co-FeAl-O thin films using the magneto-optical Kerr effect technique. An increase in magnetic anisotropy was found in the near-surface region of the film, which is ascribed to the microstructural change occurring in this region. It is found that the partial pressure of oxygen caused considerable changes in the transverse Kerr effect spectra and hence the magnetic properties of the thin films. The step-like magnetization behavior was observed at a light wavelength of 310 nm while it disappeared for higher wavelengths of light. The step-like magnetization phenomenon is due to the magnetic wall displacement process of each fracturized domain in the surface region. (C) 2005 Elsevier Ltd. All rights reserved.
引用
收藏
页码:721 / 724
页数:4
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