Co的磁声发射研究  

MAGNETO ACOUSTIC EMISSION OF COBALT

作　　者：刘静[1] 杜凤牡[1] 徐约黄[2] 

机构地区：[1]武汉大学 [2]武汉大学物理系,教授武汉430072

出　　处：《金属学报》1993年第11期A500-A505,共6页Acta Metallurgica Sinica

摘　　要：流行的磁声发射源模型只承认来源于90°磁畴壁的运动.本文对公认只含180°磁畴壁的Co进行了磁声发射及Barkhausen噪音的测量,对二者的信号作了幅度分布分析.测量了Co的磁化曲线与磁滞回线.观察了磁畴结构.只含180°磁畴壁的Co在磁化至“拐膝”之前已有明显的声发射信号,信号的幅度分布与硅钢的相似从而进一步说明了180°磁畴壁运动对磁声发射确有贡献,对该结果提出了模型。The magneto acoustic emission (MAE) and Barkhausen noise (BN) of Co thatcontains 180 magnetic domain walls only were investigated. The magnetization curve andhysteresis loop of Co were measured. The magnetic domain pattern of Co was observed. TheMAE signals is evident before the appearance of 'knee- on the magnetization curve. Thecharacteristic of the amplitude distribution of MAE of Co is the same as that of Fe-Si alloy.This means that the motion of 180° magnetic domain wall do contribute to MAE. The mod-el of the sources of MAE was discussed.

关 键 词：钴 磁畴 声发射 研究 

分 类 号：TG111.92[金属学及工艺—物理冶金]