Magnetic aftereffect and magnetic force microscopy studies of Fe-B FePt -type nanocomposite ribbons

被引：0
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作者：
Chang, C.W. [1 ]
Chang, H.W. [1 ,2 ]
Chiu, C.H. [1 ]
Chang, W.C. [1 ]
Fang, Y.K. [3 ]
Han, B.S. [3 ]
机构：
[1] Department of Physics, National Chung Cheng University, Ming-Hsiung, Chia-Yi, Taiwan
[2] Institute of Physics, Academia Sinica, Nankang, Taipei, Taiwan
[3] Institute of Physics, Center for Condensed Matter Physics, Chinese Academy of Science, Beijing 100080, China
来源：
Journal of Applied Physics | 2006年 / 99卷 / 08期
关键词：
Magnetic aftereffect and surface magnetic domain structure of (Fe0.675 Pt0.325) 100-x Bx (x=12-20) nanocomposites have been investigated for correlating with their corresponding phases and magnetic properties. Exchange-coupling effect between grains is present for all the studied ribbons as evidenced by Henkel plot. The volume fraction of magnetically soft phases decreases with increasing B concentration from x=12 to x=18. It leads to the reduction in the activation volume of the reverse domain. Among all samples; the (Fe0.675 Pt0.325) 82 B18 ribbon having the highest intrinsic coercivity (Hci) exhibits minimum value in activation volume V=1.1× 10-18 cm3; because it possesses the least volume fraction of the magnetic soft phases; i.e; Fe2 B or Fe3 B phases. Magnetic force microscopy studies reveal the magnetic domain structures of the ribbons; confirming the existence of strong exchange coupling between magnetic grains. © 2006 American Institute of Physics;
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