华东师范大学学报（自然科学版） >

2017 >Issue 3: 114 - 119

DOI: https://doi.org/10.3969/j.issn.1000-5641.2017.03.013

物理学与电子学

电流退火及长度对玻璃包裹丝GMI效应的影响

  • 蒋申骏 ,
  • 潘海林 ,
  • 赵振杰
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  • 华东师范大学 物理与材料科学学院, 上海 200062
蒋申骏,男,硕士研究生,研究方向为磁性材料.E-mail:365068180@qq.com

收稿日期: 2016-04-27

  网络出版日期: 2017-05-18

基金资助

国家自然科学基金（51302085；11574084；51572086）

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Influence of current annealing and length of microwires on GMI effect

  • JIANG Shen-jun ,
  • PAN Hai-lin ,
  • ZHAO Zhen-jie
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  • School of Physics and Materials Science, East China Normal University, Shanghai 200062, China

Received date: 2016-04-27

  Online published: 2017-05-18

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摘要

采用高频感应加热熔融快淬法制备了Fe73.5Cu1.0Nb3.0Si13.5B9非晶玻璃包裹丝.首先对制备态包裹丝进行电流退火，结果发现电流密度为4.2×107 A/m2时，退火得到的玻璃包裹丝性能最佳，原因是此时有合适的纳米晶体积比例.进而研究了长度对其磁性和巨磁阻抗效应的影响.结果表明，随着长度的减小，微丝的各项异性场增大，磁阻抗比减小.采用退磁场模型给予了合理解释.

关键词： 巨磁阻抗; 电流退火; 玻璃包裹丝; 长度

本文引用格式

蒋申骏 , 潘海林 , 赵振杰 . 电流退火及长度对玻璃包裹丝GMI效应的影响[J]. 华东师范大学学报（自然科学版）, 2017 , (3) : 114 -119 . DOI: 10.3969/j.issn.1000-5641.2017.03.013

Abstract

Amorphous Fe73.5Cu1.0Nb3.0Si13.5B9 microwires are prepared by the Taylor-Ulitovsky method. Then, the as-prepared microwires are annealed by cuurent annealing. The best performance microwires are obtained at annealing current density of 4.2×107 A/m2 because of the suitable volume ratio between nanocrystalline and amorphous phases. Influence of length on giant magnetoimpedance effect and magnetic properties for microwires is then investigated. The results show that anisotropy field increases and the GMI ratio descreases with decreased length of the wire. Demagnetizing field model gives a reasonable explanation.

Key words： giant magneto impedance (GMI); current annealing; microwires; length

参考文献

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