Domain wall propagation in Fe-rich magnetic microwires with graded magnetic anisotropy

Author:

Corte-Leon P.12,Zhukova V.12ORCID,Blanco J. M.2,Ipatov M.1,Fert A.1,Gonzalez J.1,Zhukov A.123ORCID

Affiliation:

1. Department of Advanced Polymers and Materials: Physics, Chemistry and Technology, Faculty of Chemistry, UPV/EHU, 20018 San Sebastian, Spain

2. Department of Applied Physics I, EUPDS, UPV/EHU, 20018 San Sebastian, Spain

3. IKERBASQUE, Basque Foundation for Science, 48011 Bilbao, Spain

Abstract

We observed that stress-annealing of Fe75B9Si12C4 magnetic microwire at variable annealing temperature allows to create graded magnetic anisotropy. We have found that single domain wall (DW) propagation in a media with graded magnetic anisotropy is essentially non-uniform: faster DW propagation is observed in the region with moderate stress-annealing induced magnetic anisotropy. Higher DW velocity in the region with induced magnetic anisotropy is explained by the transverse character of stress-annealing induced magnetic anisotropy which affects the travelling DW in a similar way as application of transversal bias magnetic field. Obtained graded magnetic anisotropy allows engineering the DW dynamics of Fe-rich microwires.

Funder

Ministerio de Ciencia, Innovación y Universidades

Eusko Jaurlaritza

Euskal Herriko Unibertsitatea

Diputación Foral de Gipuzkoa

European Regional Development Fund

European Science Foundation

Publisher

AIP Publishing

Subject

General Physics and Astronomy

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