Co_(60.15)Fe_(4.35)Si_(12,5)B_(15)非晶合金在低频脉冲磁场作用下纳米晶化的巨磁阻抗效应研究  

Research of Giant Magnetic Impedance Effect in Nano-crystallization of Amorphous Alloy Co_(60.15)Fe_(4.35)Si_(12,5)B_(15) Treated in Lower Frequency Pulse Magnetic Field

作　　者：金莹[1] 郭红[1] 

机构地区：[1]辽宁石油化工大学理学院,辽宁抚顺113001

出　　处：《辽宁科技学院学报》2008年第4期33-34,共2页Journal of Liaoning Institute of Science and Technology

基　　金：国家高技术研究发展计划项目(2002AA30260)资助

摘　　要：对Co60.15Fe4.35S i12,5B15非晶合金进行低频脉冲磁场处理,当脉冲频率固定,脉冲磁场强度为250Oe时观察到较大的GM I效应。研究了脉冲磁场作用产生巨磁阻抗的机理:脉冲磁场作用产生的磁致伸缩能降低了非晶合金的形核势垒,使非晶合金得以纳米晶化,进而提高了材料的软磁性能,获得较大的GM I效应。Amorphous alloy have been treated by lower frequency pulse magnetic field. Larger GMI effect can be observed when the pulse magnetic field intensity is 2500e,with the condition of keeping pulse frequency constant. The research of GMI effect mechanism shows that the magnetestriction energy resulting from the pulse magnetic action reduces the nucleating potential barrier of amorphous crystallization , so that improves the nanocrystallization of amorphous alloy, increases the soft magnetic properties of materials and acquires larger GMI effect.

关 键 词：非晶合金 纳米晶化 脉冲磁场 

分 类 号：TG139.8[一般工业技术—材料科学与工程] TG132.271[金属学及工艺—合金]