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Route of magnetoimpedance and domain walls dynamics optimization in Co-based microwires

Abstract: The influence of post-processing (annealing and stress-annealing) on the magnetic softness, Giant magnetoimpedance (GMI) effect and domain wall dynamics of Fe3.6Co69.2Ni1B12.5Si11Mo1.5C1.2 glass-coated microwires is studied. As-prepared Co-rich glass-coated microwire presents linear hysteresis loops and rather higher magnetoimpedance ratio with double-peak magnetic field dependence, typical for materials with transverse magnetic anisotropy. Considerable magnetic hardening and transformation of linear hysteresis loop with low coercivity (Hc ? 4 A/m) into rectangular with Hc ? 90 A/m upon annealing without stress is observed. However, we observed remarkable MI effect improvement at certain annealing conditions. Stress-annealing of studied microwire allows considerable magnetoimpedance ratio and domain wall velocity increasing. Additionally, remanent magnetization growth and coercivity decrease are generally observed upon stress annealing. Frequency dependence of maximum GMI ratio for as-prepared and annealed samples is evaluated. The obtained frequency dependence of the maximum GMI ratio allows determination of the optimal GMI measurement conditions for each sample. The observed stress-induced anisotropy and related changes in magnetic properties are discussed considering the internal stresses relaxation and "back-stresses".

Otras publicaciones de la misma revista o congreso con autores/as de la Universidad de Cantabria

 Autoría: Gonzalez-Legarreta L., Corte-León P., Zhukova V., Ipatov M., Blanco J.M., Churyukanova M., Taskaev S., Zhukov A.,

 Fuente: Journal of Alloys and Compounds, 2020, 830, 154576

Editorial: Elsevier Ltd

 Fecha de publicación: 25/07/2020

Nº de páginas: 22

Tipo de publicación: Artículo de Revista

 DOI: 10.1016/j.jallcom.2020.154576

ISSN: 0925-8388,1873-4669

Proyecto español: PGC2018-099530-B-C31

Url de la publicación: https://doi.org/10.1016/j.jallcom.2020.154576

Autores/as

CORTE LEÓN, PAULA

ZHUKOVA, VALENTINA

IPATOV, MIHAIL

BLANCO ARANGUREN, JUAN MARÍA

CHURYUKANOVA, MARGARITA

TASKAEV, SERGEY

ZHUKOV, ARCADY