Engineering of magnetic softness and giant magnetoimpedance effect in Fe-rich microwires by stress-annealing. (1st January 2018)

• Record Type: Journal Article
• Authors: Zhukova, V.; Blanco, J.M.; Ipatov, M.; Gonzalez, J.; Churyukanova, M.; Zhukov, A.
• Is Part Of: Scripta materialia. Number 142(2018)
• Page Start: 10
• Page End: 14
• Publication Date: 2018-01-01
• Subjects: Magnetic microwires -- GMI effect -- Magnetic softness -- Annealing -- Internal stresses; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2017.08.014
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: Magnetic softness and giant magnetoimpedance (GMI) effect of Fe-rich microwires has been considerably improved by stress-annealing: we obtained maximum GMI ratio about one order higher than in as-prepared Fe-rich microwire and of the same order as in as-prepared Co-rich microwire. High enough bias current allows drastic increasing of GMI ratio of Fe-rich microwires up to 120% and off-diagonal GMI effect but also produces irreversible changes of GMI effect related to Joule heating of the samples. For interpretation of observed dependences we considered internal stresses relaxation after annealing interplay of compressive "back-stresses" arising after stress annealing and axial internal stresses. Graphical abstract: