低频脉冲磁场致Co_(60.15)Fe_(4.35)Si_(12.5)B_(15)非晶合金纳米晶化的GMI  

Giant Magnetic Impedance Effect on Nano-Crystallization of Amorphous Alloy Co_(60.15)Fe_(4.35)Si_(12.5)B_(15) Caused by 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：《辽宁石油化工大学学报》2008年第3期87-88,92,共3页Journal of Liaoning Petrochemical University

基　　金：国家高技术研究发展计划项目(2002AA30260)

摘　　要：采用低频脉冲磁场致Co60.15Fe4.35Si12.5B15非晶合金纳米晶化,晶化过程温升小于5℃,有效避免了材料变脆,获得了优于常规等温退火的纳米晶软磁性能。从实验中观察到较大的GMI效应,且最佳驱动电流频率为2MHz,横向磁各向异性场为0.9kA/m。Nano-crystallization of amorphous alloy Co60.15Fe4.35Si12.5B15 can be realized with the process of low frequency pulsating magnetic field. In the process of crystallization, temperature rising is less than 5℃, which can prevent efficiently material from getting fragile and obtain the nano crystallization soft magnetic properties superior to routine isothermal annealing. The larger GMI effect was observed in the experiment, and the best driving frequency is 2 MHz and the transverse anisotropy field is 0.9 kA/m.

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]