Effect of Joule heating on giant magnetoimpedance effect and magnetic properties of Co-rich microwires

[摘要] The effect of Joule-heating on hysteresis loops and giant magnetoimpedance effect, GMI; of Co69.2Fe3.6Ni1B12.5Si11Mo1.5C1.2 glass-coated microwire is studied. Joule heating performed at suitable conditions prevents the magnetic hardening observed during conventional furnace annealing of the studied microwires. A remarkable GMI ratio improvement is observed as compared to as-prepared annealed and even stress-annealed microwires. Observed magnetic softening and GMI ratio improvement have been discussed considering magnetic anisotropy induced by Oersted magnetic field during Joule heating and internal stresses relaxation. (C) 2021 The Authors. Published by Elsevier B.V.

[发布日期] 2021-11-25

[关键词] Magnetic microwires;GMI effect;Magnetic softness;Joule heating;Magnetic anisotropy