DocumentCode :
3560152
Title :
Circular Magnetoelastic Anisotropy Induced in the Nucleus of an FeSiB-CoNi Soft-Hard Bi-Phase Microwire
Author :
Torrej?³n, J. ; Infante, G. ; Merazzo, K.J. ; Badini-Confalonieri, G.A.
Author_Institution :
Inst. de Cienc. de Mater. de Madrid, Cantoblanco
Volume :
44
Issue :
11
fYear :
2008
Firstpage :
3942
Lastpage :
3945
Abstract :
Multilayer amorphous microwires have been prepared coating a precursor FeSiB amorphous nucleus with a crystalline CoNi outer layer. The FeSiB as-cast amorphous wire is characterised by an unique bistable behavior where magnetization reverses from one remanent state to another through a single large Barkhausen event at a field value known as switching field, Hsw. In multilayer microwires, the presence of a second magnetic phase, a magnetically harder CoNi layer, substantially modifies the values of Hsw via two coupling mechanisms: magnetoelastic and magnetostatic interactions between the two phases. In this paper, a systematic study on the effects of the geometrical characteristic of the outer phase on the Hsw behavior is presented. M-H analysis and fluctuation studies by induction technique were performed on a family of samples having different CoNi thicknesses.
Keywords :
Barkhausen effect; amorphous magnetic materials; boron alloys; cobalt alloys; iron alloys; magnetic anisotropy; magnetic multilayers; magnetisation reversal; magnetoelastic effects; magnetostatics; nickel alloys; permanent magnets; remanence; silicon alloys; soft magnetic materials; Barkhausen event; FeSiB-CoNi; amorphous nucleus; circular magnetoelastic anisotropy; coupling mechanisms; crystalline outer layer; fluctuation; magnetic phase; magnetization reversal; magnetoelastic interactions; magnetostatic interactions; multilayer amorphous microwires; remanent state; soft-hard biphase microwire; Biphase systems; magnetic amorphous microwires; magnetization reversal; switching field;
fLanguage :
English
Journal_Title :
Magnetics, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9464
Type :
jour
DOI :
10.1109/TMAG.2008.2002193
Filename :
4717493
Link To Document :
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