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Materials Technology
Advanced Performance Materials
Volume 31, 2016 - Issue 6
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Research Paper

Impact of ribbon width on magnetoimpedance and permeability of Fe69.2Co7.7Cu0.6Nb2.5Si11B9 soft magnetic alloy

Y. DingSchool of Electronics Information Engineering, Tianjin Key Laboratory of Film Electronic and Communication Devices, Tianjin University of Technology, Tianjin, China
,
R. TianSchool of Electronics Information Engineering, Tianjin Key Laboratory of Film Electronic and Communication Devices, Tianjin University of Technology, Tianjin, China
,
K. XueSchool of Electronics Information Engineering, Tianjin Key Laboratory of Film Electronic and Communication Devices, Tianjin University of Technology, Tianjin, China
,
X. WangSchool of Electronics Information Engineering, Tianjin Key Laboratory of Film Electronic and Communication Devices, Tianjin University of Technology, Tianjin, China
,
Y. ShiSchool of Electronics Information Engineering, Tianjin Key Laboratory of Film Electronic and Communication Devices, Tianjin University of Technology, Tianjin, China
&
X. MaSchool of Material Science and Engineering, Tianjin University of Technology, Tianjin, ChinaCorrespondence[email protected]
Pages 337-341 | Received 27 Mar 2015, Accepted 02 Jul 2015, Published online: 02 Feb 2016
 
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Abstract

Fe69.2Co7.7Cu0.6Nb2.5Si11B9 soft magnetic alloy ribbons of different widths, 4.4 and 8.0 mm respectively, were used for the research work. The influences of structural modifications induced by heat treatment on magnetoimpedance effect and permeability have been studied. In as quenched state and annealed at temperatures < 773 K, 4.4 mm wide ribbons showed larger MI values than the 8.0 mm wide ribbons. After being annealed at temperatures >823 K, the MI values of the 8.0 mm wide ribbons were slightly higher than those of 4.4 mm wide ribbons due to the improved soft magnetic properties. With controlled heat treatment at 853 K, a maximum MI ratio of 82% was detected for the 8.0 mm wide ribbon.

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