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Impact of stress induced anisotropic modifications on magneto-impedance behaviour of rapidly quenched CoFe based microwires.

Impact of stress induced anisotropic modifications on magneto-impedance behaviour of rapidly quenched CoFe based microwires.

Authors :
Panda, Ashis K
Anurag, Kumar
Das, Somnath
Das, Tarun K
Murugaiyan, Premkumar
Roy, Rajat K.
Mitra, Amitava
Source :
Journal of Alloys & Compounds. Oct2023, Vol. 960, pN.PAG-N.PAG. 1p.
Publication Year :
2023

Abstract

The investigation addresses the role of Al in devitrification stage of a series of (Co 94 Fe 6) 72.5 Si 12.5−x Al x B 13 Cr 2 (X = 0, 2, 4, 6 at%) rapidly quenched microwires. The incorporation of Al displayed reduction in primary onset and activation energy (A.E) while it facilitated widening of span between primary and secondary crystallization onsets. The Giant Magneto-Impedance (GMI) behaviour was influenced by Al concentration as well as applied uniaxial stress. Optimal Al containing alloy (x ∼ 2 at%) displayed signature of asymmetric dual peak at the operating frequency of 1 MHz and its prospective application as a very low magnetic field sensor in pre-stressed condition. However, with increasing stress, the asymmetric character transformed to symmetric dual peak which is attributed to the transition of transverse anisotropy to circular anisotropy via helical anisotropy. High stress sensitivity has been attributed to either dominant transverse or circular anisotropy. The transition of stress induced anisotropies in the microwires has been portrayed schematically to elucidate the transitions. • The Al incorporation for Si impacts on magnetostriction and anisotropy of microwires. • The microwires reveal change in GMI peak shape with applied stress. • The change in shape of GMI peak (dual, single) with uniaxial stress is associated to change in anisotropy. • Transition in helical, circumferential and transverse anisotropy with stress and compositional is discussed. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
09258388
Volume :
960
Database :
Academic Search Index
Journal :
Journal of Alloys & Compounds
Publication Type :
Academic Journal
Accession number :
164857201
Full Text :
https://doi.org/10.1016/j.jallcom.2023.170751