Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 789, Issue -, Pages 201-208Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2019.03.044
Keywords
Magnetic glass-coated microwires; Soft magnetic properties; Magnetic bistability; Magnetostriction; Annealing
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Funding
- Spanish MINECO [MAT2013-47231-C2-1-P]
- Basque Country Government [IT954-16, PIBA 2018-44, RTM 4.0]
- Russian Foundation for Basic Research [16-53-48012]
- Act 211 Government of the Russian Federation [02.A03.21.0011]
- ERDF
- ESF
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We studied the effect of applied tensile stresses on magnetic properties of Fe- and Co-rich amorphous glass-coated microwires. Rising of magnetic anisotropy field upon tensile stress in Co-rich glass-coated microwires is described by a linear dependence. Furthermore, decrease of magnetic susceptibility upon tensile stress is observed in Co-rich microwires. A monotonous increase in the coercivity and the switching field upon tensile applied stress is observed for as-prepared Fe-rich microwire. Stress induced magnetic bistability consisting of transformation of hysteresis and onset of rectangular hysteresis loop upon tensile stress, sigma, of about 22.5 MPa is observed in stress-annealed Fe-rich microwires. Such stress-induced magnetic bistability results in considerable growing of coercivity and remanent magnetization in stress-annealed Fe-rich microwires. The rising in the coercivity and the switching field upon applied tensile stresses in stress-annealed Fe-rich microwires with stress induced magnetic bistability at (sigma > 22.5 MPa) is roughly described by the sigma 1/2. dependence, as previously reported for the wires with spontaneous magnetic bistability. Consequently, stress-annealing of Fe-rich microwire allows beneficial enhancement of the stress dependence of coercivity. Observed dependencies are discussed considering stress dependence of the magnetostriction coefficient in Co-rich glass-coated microwires, internal stresses redistribution and domain structure rearrangement in stress-annealed Fe-rich microwires upon applied tensile stresses. (C) 2019 Elsevier B.V. All rights reserved.
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