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复合焦耳处理对Co_68·15Fe_4·35Si_12·5B₁₅非晶薄带巨磁阻抗效应的影响

Influences of Multiplex Joule Heating Treatment on Giant Magnetoimpedance Effects in Co_68·15Fe_4·35Si_12·5B₁₅ Amorphous Ribbons

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【Author】 Zhang De-fen~1,Chen Xiao-wen~2 (1. School of Mechanical Engineering, Liaoning University of Petroleum and Chemical Technology, Liaoning Fushun 113001, China; 2. Amorphous Products Branch, Advanced Technology and Materials Co., Ltd, National Amorphous and Nanocrystalline Alloy Engineering Research Center,Beijing 100081,China)

【机构】辽宁石油化工大学机械工程学院；安泰科技股份有限公司非晶制品分公司国家非晶微晶合金工程技术研究中心辽宁抚顺113001；北京100081；

【摘要】本文研究了复合焦耳处理对Co68·15Fe4·35Si12·5B15非晶薄带巨磁阻抗效应的影响。实验结果表明:经前段电流密度10A/mm2,后段电流密度30A/mm2的复合焦耳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217%,灵敏度为114%/Oe,比淬态下的最大磁阻抗比和灵敏度均有明显提高。复合焦耳处理是提高材料GMI效应的一种新型的而且十分有效的方法。更多还原

【Abstract】 The influences of multiplex Joule heating treatment on GMI effects of Co_ 68.15 Fe_ 4.35 Si_ 12.5 B_ 15 amorphous soft magnetic ribbons were investigated. After the samples were annealed by multiplex treatment of the first step with current density 10 A/mm~2 and the second step with current density 30 A/mm~2, the maximum GMI effect has obtained. The maximum magnetoimpedance ratio is 217% and the sensitivity is 114%/Oe at a frequency of 8MHz.This has been improved evidently than that of as-cast samples . The results show that the multiplex Joule heating treatment is a novelty and effective method for improving GMI effect.更多还原