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http://dx.doi.org/10.4283/JKMS.2009.19.6.191

Magnetic Bias Effects in Field-annealed CoFeSiB Amorphous Ribbons  

Cha, Yong-Jun (Department of Materials Science and Engineering, Chungnam National University)
Jeong, Jong-Ryul (Department of Materials Science and Engineering, Chungnam National University)
Kim, Cheol-Gi (Department of Materials Science and Engineering, Chungnam National University)
Kim, Dong-Young (Department of Physics, Andong National University)
Yoon, Seok-Soo (Department of Physics, Andong National University)
Abstract
Magnetic bias phenomena of field-annealed CoFeSiB amorphous ribbons showing asymmetric giant magnetoimpedance was investigated by MOKE method. The specimens removed the crystalline layer at one surface side by chemical etching were prepared and measured magnetization curves by MOKE to investigate the effect of the crystalline layer on magnetization of inner soft amorphous phase. We observed the shift of hysteresis loop, and concluded that the crystalline layer exerts bias field effect on inner soft amorphous phase and the direction of bias filed is opposite to the magnetization direction of surface crystalline layer.
Keywords
bias field; magnetoimpedance; amorphous ribbon;
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