Applied Sciences (Feb 2020)

Stress-Induced Magnetic Anisotropy Enabling Engineering of Magnetic Softness and GMI Effect of Amorphous Microwires

  • Paula Corte-León,
  • Ahmed Talaat,
  • Valentina Zhukova,
  • Mihail Ipatov,
  • Juan María Blanco,
  • Julián Gonzalez,
  • Arcady Zhukov

DOI
https://doi.org/10.3390/app10030981
Journal volume & issue
Vol. 10, no. 3
p. 981

Abstract

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Stress-annealing enabled a considerable improvement in the GMI effect in both Fe- and Co-rich glass-coated microwires. Additionally, a remarkable magnetic softening can be achieved in stress-annealed Fe-rich microwires. Observed stress-annealing induced magnetic anisotropy is affected by annealing conditions (temperatures and stresses applied during annealing). The highest GMI ratio up to 310% was obtained in stress-annealed Co-rich microwires, although they presented rectangular hysteresis loops. A remarkable magnetic softness and improved GMI ratio over a wide frequency range were obtained in stress-annealed Fe-rich microwires. Irregular magnetic field dependence observed for some stress-annealing conditions is attributed to the contribution of both the inner axially magnetized core and outer shell, with transverse magnetic anisotropy.

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