Grading the magnetic anisotropy and engineering the domain wall dynamics in Fe-rich microwires by stress-annealing. (15th August 2018)

• Record Type: Journal Article
• Authors: Zhukova, V.; Blanco, J.M.; Corte-Leon, P.; Ipatov, M.; Churyukanova, M.; Taskaev, S.; Zhukov, A.
• Is Part Of: Acta materialia. Volume 155(2018)
• Page Start: 279
• Page End: 285
• Publication Date: 2018-08-15
• Subjects: Magnetic microwires -- Domain wall propagation -- Magnetic softness -- Annealing -- Internal stresses -- Induced anisotropy; Materials -- Periodicals; Materials science -- Periodicals; Materials -- Mechanical properties -- Periodicals; Metallurgy -- Periodicals; Chemistry, Inorganic -- Periodicals; 620.112
• DOI: 10.1016/j.actamat.2018.05.068
• Languages: English
• ISSNs: 1359-6454

Abstract

Abstract: We have studied the magnetic properties and domain wall dynamics in Fe-rich microwires subjected to stress-annealing. The hysteresis loops of Fe-rich microwires were considerably affected by stress-annealing. We obtained drastic decrease in coercivity and change in the character of hysteresis loops from rectangular to linear in stress-annealed Fe-rich microwires. For the wires after stress-annealing at variable temperatures we obtained a graded magnetic behavior with local hysteresis loops shapes and features (coercivity, remanent magnetization) changing along the sample length. In the samples subjected to local stress-annealing we created an artificial source of domain wall injection allowing the manipulation of domain wall dynamics. The observed stress-induced anisotropy could be related to the internal stress relaxation after annealing and the interplay of compressive "back-stresses" arisen after stress annealing and axial internal stresses. Graphical abstract: Image 1