摘要
研究了两段式焦耳处理对Co71.8Fe4.9Nb0.8Si7.5B15非晶薄带巨磁阻抗效应的影响。实验结果表明:经第1段电流密度为15 A/mm2、第2段电流密度为35 A/mm2的复合处理后,样品获得了最大的GMI效应。在8MHz的交变电流频率下,最大磁阻抗比为305%,灵敏度为0.575%/(A.m-1)。两段式焦耳处理是提高材料GMI效应的一种新的而且十分有效的方法。
The influence of two-step Joule heating treatment on GMI effects of Co71.8Fe4.9Nb0.8Si7.5B15 amorphous soft magnetic ribbons were investigated. After two-step composite annealling with electrical current density of 15 A/mm^2 at first step and electrical current density of 35 A/mm^2 at second step, the maximum GMI effect can be obtained. The maximum magnetoimpedance ratio is 305% and the sensitivity is 0. 575%（A·m^-1 ） at a frequency of 8 MHz. The results show that the two-step Joule heating treatment is a novelty and effective method for improving GMI effect.
出处
《钢铁研究学报》
CAS
CSCD
北大核心
2006年第4期55-58,共4页
Journal of Iron and Steel Research
基金
国家"863"高技术研究发展计划资助项目(2002AA302601)
关键词
巨磁阻抗效应
热处理
非晶薄带
giant magnetoimpedance effect
heating treatment
amorphous ribbon
