Hysteretic giant magnetoimpedance effect analyzed by first-order reversal curves

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• 作者：F. Bé ; ron^a ; ^{fberon@ifi.unicamp.br} ; L.A. Valenzuela^a ; M. Knobel^a ; L.G.C. Melo^b ; K.R. Pirota^a
• 关键词：Giant magnetoimpedance (GMI) ; First-order reversal curve (FORC) ; Amorphous ribbons ; Hysteron
• 刊名：Journal of Magnetism and Magnetic Materials
• 出版年：2012
• 出版时间：April 2012
• 年：2012
• 卷：324
• 期：8
• 页码：1601-1605
• 全文大小：1455 K

文摘

We applied the first-order reversal curve method to hysteretic giant magnetoimpedance (GMI) of soft magnetic amorphous ribbons with a well-defined transversal domain structure and quasi-anhysteretic magnetization behavior. In opposition to major curve, it gives access to the distribution of local irreversible changes of the transverse permeability, which undergo a gradual transition. Results show that hysteretic GMI effect consists of three distinct regimes depending on the applied field. An interlinked hysteron/anti-hysteron model is proposed to analyze the obtained results, which allows one to follow the influence of frequency and anisotropy upon the irreversible switches probed by GMI.