外镀铜层玻璃包裹丝的巨磁阻抗效应  

Giant magneto-impedance on glass-coated microwires with copper layer

作　　者：王蕊丽[1,2] 阮建中[2] 孔祥洪[1] 杨渭[1] 王江涛[3] 赵振杰[2] 

机构地区：[1]上海海洋大学物理实验室,上海201306 [2]华东师范大学物理系纳光电集成与先进装备教育部工程研究中心,上海200062 [3]华东师范大学软件学院,上海200062

出　　处：《华东师范大学学报（自然科学版）》2013年第1期115-120,共6页Journal of East China Normal University(Natural Science)

基　　金：上海市科委项目(10520706300);大学物理创新实验(B-8606-10-0001-14);大学物理基础实验室建设(B-5109-11-0007)

摘　　要：首先利用高频感应加热熔融拉丝法制备了Fe_(73.0)Cu_(1.0)Nb_(2.0)Si_(13.5)B_(9.0)玻璃包裹非晶丝;然后在氮气保护下480～650℃之间退火0.5 h;最后利用化学镀方法在570℃退火的玻璃包裹丝上沉积了一层铜,构成复合结构丝.利用扫描电镜测量了材料的几何尺寸,研究了玻璃包裹丝退火前后及复合结构丝的巨磁阻抗效应.结果表明,材料的软磁特性改善提高了材料的磁阻抗比,铜层与磁性层之间的电磁相互作用也影响磁阻抗比.The amorphous wires of nominal compositions Fe73.0Cu1.0Nb2.0Si13.5B9.0 were prepared by glass-coating melt-spinning method. Then, the wires were annealed at 480-650 ℃ for 30 min in nitrogen atmosphere. The composite wires with copper layer using electroless depo- sition were produced, a thin layer of copper deposited onto the mierowires annealed at 570 ℃. The morphology of composite microwires was observed using SEM. The giant magnetoimpedance effect on the samples was investigated. The results show that soft magnetic properties of the specimen can improve its MI ratio. The electromagnetic interactions between the ferromag- netic core and the copper layer can also affect MI ratio.

关 键 词：巨磁阻抗效应 化学镀 趋肤效应 软磁特性 

分 类 号：O482.5[理学—固体物理]