低频脉冲磁场处理Co_(60.15)Fe_(4.35)Si_(12.5)B_(15)非晶合金薄带巨磁阻抗效应的研究  

Study of the giant magnetic impedance effect of Co_(60.15)Fe_(4.35)Si_(12.5)B_(15) amorphous alloy ribbons by low-frequency magnetic pulsing

作　　者：郭红[1,2] 晁月盛[1] 金莹[2] 

机构地区：[1]东北大学理学院,辽宁沈阳110004 [2]辽宁石油化工大学理学院,辽宁抚顺113001

出　　处：《功能材料》2010年第6期1038-1041,共4页Journal of Functional Materials

基　　金：高等教育博士专项基金资助项目(20020145009)

摘　　要：对Co60.15Fe4.35Si12.5B15非晶合金薄带进行了低频脉冲磁场处理,M ssbauer谱分析及透射电镜观察表明样品发生了纳米晶化,处理过程样品温升ΔT≤5℃,在直流磁场Hex为0.296kA/m、交变驱动电流频率为2MHz时,磁阻抗比值达255%。实验表明,材料的巨磁阻抗效应与低频脉冲磁场的频率、强度有关,同时低频脉冲磁场处理致非晶合金纳米晶化创新了一种获得巨磁阻抗效应新的处理工艺。Amorphous Co60.15Fe4.35Si12.5B15 alloys had been treated by low frequency magnetic pulsing.The results showed that nano-crystallization of specimens can occur by Mssbauer spectroscopy and TEM.The temperature rise ΔT≤5℃ in the course.The GMI was greater than 255% under the conditions： external magnetic field 0.296kA/m;Ac current frequency 2MHz.The quantity of GMI effect has relation to the frequency of low-frequency pulsating magnetic field,intensity.The magneto-nanocrystallization of amorphous alloy is a new processing technique gaining GMI effect.

关 键 词：低频脉冲磁场 非晶合金纳米晶化 巨磁阻抗效应 

分 类 号：TB34[一般工业技术—材料科学与工程]