%0 Journal Article
%T Analysis of current-density distribution and giant magnetoimpedance effect in composite wires<br>复合结构丝中的电流密度分布和巨磁阻抗效应
%A Liu Long-Ping
%A Zhao Zhen-Jie
%A Huang Can-Xing
%A Wu Zhi-Ming
%A Yang Xie-Long
%A <br>刘龙平
%A 赵振杰
%A 黄灿星
%A 吴志明
%A 杨燮龙
%J 物理学报
%D 2006
%I 
%X The current-density distribution and giant magnetoimpedance (GMI) properties are theoretically described for the homogenous ferromagnetic wires and composite wi res consisting of an inner conductive core covered by an outer ferromagnetic coa ting. The numerical simulation shows that the current is distributed much close r to the surface for the Cu/FeCoNi composite wires than for FeCoNi homogenous f erromagnetic wires at the same frequency and with the same geometric size and m agnetic structure. When obvious MI effect can be observed, the skin effect has a lready been strong in its ferromagnetic coating. The skin effect is still an imp ortant factor for the GMI effect in composite wires. Above a certain frequency o f about 4MHz, the driving current will flow through the ferromagnetic coating ma inly and the electromagnetic interactions become weaker, the MI behavior in the composite wire becomes similar to that in the homogenous ferromagnetic wire.
%K current density
%K giant magnetoimpedance effect
%K skin effect<br>电流密度
%K 巨磁阻抗效应
%K 趋肤效应
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=29DF2CB55EF687E7EFA80DFD4B978260&aid=15B2D4D6E94F9336&yid=37904DC365DD7266&vid=E514EE58E0E50ECF&iid=E158A972A605785F&sid=9EAD63ADE6B277ED&eid=0D1D160AB8016934&journal_id=1000-3290&journal_name=物理学报&referenced_num=1&reference_num=26