Journal
APPLIED SCIENCES-BASEL
Volume 10, Issue 3, Pages -Publisher
MDPI
DOI: 10.3390/app10030981
Keywords
GMI effect; magnetic microwires; magnetic softness; annealing; magnetic anisotropy
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Funding
- Spanish MCIU (MCIU/AEI/FEDER, UE) [PGC2018-099530-B-C31]
- Government of the Basque Country [PIBA 2018-44]
- University of Basque Country, under the scheme of Ayuda a Grupos Consolidados [GIU18/192]
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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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