复合焦耳处理对Co_(68·15)Fe_(4·3)5Si_(12·5)B_(15)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_(68·15)Fe_(4·3)5Si_(12·5)B_(15) Amorphous Ribbons

作　　者：张德芬[1] 陈孝文[2] 

机构地区：[1]辽宁石油化工大学机械工程学院,辽宁抚顺113001 [2]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,北京100081

出　　处：《金属功能材料》2006年第6期4-7,共4页Metallic Functional Materials

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。The influences of multiplex Joule heating treatment on GMI effects of Co68.15Fe4.35Si12.5B15 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.

关 键 词：复合焦耳处理 巨磁阻抗效应 非晶薄带 

分 类 号：TG139.8[一般工业技术—材料科学与工程]