Highly sensitive giant magnetoimpedance in a solenoid containing FeCo-based ribbon

The highly sensitive giant magneto-impedance effect in a solenoid containing a magnetic core of Fe36Co36Nb4Si4.sB19.2 （FeCo-based） ribbon under a weak magnetic field （WMF） is presented in this paper. The FeCo-based amorphous ribbon is prepared by single roller quenching and annealed with Joule heat...

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Bibliographic Details
Published inChinese physics B Vol. 21; no. 3; pp. 423 - 427
Main Authors Fang, Yun-Zhang, Xu, Qi-Ming, Zheng, Jin-Ju, Wu, Feng-Min, Ye, Hui-Qun, Si, Jian-Xiao, Zheng, Jian-Long, Fan, Xiao-Zhen, Yang, Xiao-Hong
Format Journal Article
LanguageEnglish
Published 01.03.2012
Subjects
Analyzers
Annealing
Giant magnetoimpedance
Intermetallic compounds
Magnetic cores
Magnetic fields
Magnetoimpedance
Quenching
Ribbons
Solenoids
巨磁阻抗效应
敏感
电流密度
电磁铁
色带
钴基
驱动电流
高灵敏度
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Summary:The highly sensitive giant magneto-impedance effect in a solenoid containing a magnetic core of Fe36Co36Nb4Si4.sB19.2 （FeCo-based） ribbon under a weak magnetic field （WMF） is presented in this paper. The FeCo-based amorphous ribbon is prepared by single roller quenching and annealed with Joule heat in a flowing nitro- gen atmosphere. The giant magnetoimpedance effect in solenoid （GMIES） profiles are measured with an HP4294A impedance analyzer. The result shows that the CMIES responds to the WMF sensitively （as high as 1580 %/A.m-1）. The high sensitivity can be obtained in a moderate narrow range of annealing current density （30-34 A/mm2） and closely depends on the driven current frequency. The highest sensitivity （1580 %/A.m-1） is obtained when the FeCo- based amorphous ribbon is annealed at 32 A/mm2 for 10 min and then driven with an alterning current （AC） at the frequency of 350 kHz. The highly sensitive GMIES under the WMF may result from the multiple magnetic-anisotropic structure, which is induced by the temperature gradient produced during Joule-heating the ribbon.
Bibliography:giant magneto-impedance, FeCo-based ribbon, Joule heat, weak magnetic field
Fang Yun-Zhang , Xu Qi-Ming Zheng Jin-Ju , Wu Feng-Min Ye Hui-Qun Si Jian-Xiao Xiao-Hong Zheng Jian-Long , Fan Xmo-Zhen and Yanga） School of Material Science and Engineering, Xi＇an University of Architecture and Technology, Xi＇an 710055, China b） Research Center for Light Emitting Diodes, Zhejiang Normal University, 3inhua 321004, China c） Jinhua Polytechnic, Jinhua 321007, China
11-5639/O4
The highly sensitive giant magneto-impedance effect in a solenoid containing a magnetic core of Fe36Co36Nb4Si4.sB19.2 （FeCo-based） ribbon under a weak magnetic field （WMF） is presented in this paper. The FeCo-based amorphous ribbon is prepared by single roller quenching and annealed with Joule heat in a flowing nitro- gen atmosphere. The giant magnetoimpedance effect in solenoid （GMIES） profiles are measured with an HP4294A impedance analyzer. The result shows that the CMIES responds to the WMF sensitively （as high as 1580 %/A.m-1）. The high sensitivity can be obtained in a moderate narrow range of annealing current density （30-34 A/mm2） and closely depends on the driven current frequency. The highest sensitivity （1580 %/A.m-1） is obtained when the FeCo- based amorphous ribbon is annealed at 32 A/mm2 for 10 min and then driven with an alterning current （AC） at the frequency of 350 kHz. The highly sensitive GMIES under the WMF may result from the multiple magnetic-anisotropic structure, which is induced by the temperature gradient produced during Joule-heating the ribbon.
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:1674-1056
2058-3834
1741-4199
DOI:10.1088/1674-1056/21/3/037501