Study of giant magneto-impedance behavior in Co-Fe based amorphous/nanocrystalline materials

被引：1
|
作者：
Kumari, Seema [1 ]
Chattoraj, I. [1 ]
Pal, S. K. [1 ]
Mitra, A. [1 ]
机构：
[1] Natl Met Lab, Jamshedpur 831007, Bihar, India
来源：
MATERIALS AND MANUFACTURING PROCESSES | 2006年 / 21卷 / 07期
关键词：
amorphous ribbons; giant magnetoimpedance; magnetostriction;
D O I：
10.1080/10426910600611714
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Giant magneto-impedance (GMI) behavior have been studied in melt spun Co71-XFeXCr7Si8B14 ( X = 0, 2, 3, 2, 4, 6, 8, and 12 at%) alloys. The addition of Fe in the system changed the saturation magnetostriction constant from negative to positive values. The GMI property was measured with a driving current of 5 mA and 4 MHz frequency using a spectrum analyzer. The GMI ratio increased with the increase of the applied dc field and became maximum at a field H-k known as the anisotropy field of the materials. The maximum of GMI ratio (GMI(max)) depended on the Fe content and was maximum (12%) for Fe = 4 at% for the alloys in the as-melt spun state. Substantial increase of GMImax to 66% for Fe = 4 at% was observed after annealing the sample at 673 K.
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页码：683 / 686
页数：4
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