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Magnetic Nano- and Microwires by Manuel Vázquez

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12

Controlled single-domain wall motion in cylindrical magnetic microwires with axial anisotropy

M. Vázquez; A. Jiménez; R. Pérez del Real    Instituto de Ciencia de Materiales de Madrid, Madrid, Spain

Abstract

Amorphous microwires with high positive magnetostriction show strong uniaxial magnetic anisotropy arising from enhanced magnetoelastic and geometrically intrinsic shape anisotropies. Their magnetization reversal under a homogeneous magnetic field proceeds by the depinning and propagation of a single domain wall, resulting in bistable square-shaped hysteresis loops. In a first section, this chapter deals with the spontaneous formation of the closure domain structure at the ends of the microwire from which that single domain wall depins. ...

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