Optimization of Magnetic Properties of Magnetic Microwires by Post-Processing

Zhukova, V.; Corte-León, Paula; González-Legarreta, Lorena; Talaat, A.; Blanco, Juan Maria; Ipatov, M.; Olivera, J.; Zhukov, A.

doi:10.20944/preprints202007.0107.v1

Cited by 9 publications

(1 citation statement)

References 102 publications

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“…However, even for microwires with fixed chemical composition the Hs-values can be tuned by the internal stresses, σi, values. The main (though, not the unique) origin of the internal stresses in glass-coated microwires is the different thermal expansion coefficients of the metallic nucleus and the glass coating [36,[61][62][63][64]. Accordingly, it is assumed (and experimentally confirmed) that σi -magnitude inside the metallic nucleus is affected by the -ratio between the metallic nucleus diameter, d, and the total microwire diameter, D (=d/D) [36,[62][63][64].…”

Section: Tuning Of Hysteresis Loop Non-linearity By the Magnetostaticmentioning

confidence: 99%

Electronic Surveillance and Security Applications of Magnetic Microwires

Zhukova¹,

Corte-León²,

Blanco³

et al. 2021

Preprint

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Applications in security and electronic surveillance require combination of excellent magnetic softness with good mechanical and anti-corrosive properties and low dimensionality. We overviewed the properties of soft magnetic glass-coated microwires and different post-processing making them quite attractive for electronic article surveillance and security applications. We studied the magnetostatic interaction between the microwires and routes to tune the non-linear hysteresis loops by using the arrays of different types of amorphous microwires. The presence of neighbouring microwire (either Fe or Co-based) significantly affects the hysteresis loop of the whole microwires array. In a microwires array containing magnetically bistable microwires we observed splitting of the initially rectangular hysteresis loop with a number of Barkhausen jumps correlated with the number of magnetically bistable microwires. Essentially, non-linear and irregular hysteresis loops have been observed in mixed arrays containing Fe and Co-rich microwires. The observed non-linearity in hysteresis loops allowed to increase the harmonics and tune their magnetic field dependencies. Non-linear hysteresis loops have been also observed upon devitrification of amorphous microwires. On the other hand, several routes allowing to tune the switching field by either post-processing or modifying the magnetoelastic anisotropy have been reviewed. Observed unique combination of magnetic properties together with thin dimensions and excellent mechanical and anti-corrosive properties provide excellent perspectives for the use of glass-coated microwires for security and electronic surveillance applications.

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Section: Tuning Of Hysteresis Loop Non-linearity By the Magnetostaticmentioning

confidence: 99%

Electronic Surveillance and Security Applications of Magnetic Microwires

Zhukova¹,

Corte-León²,

Blanco³

et al. 2021

Preprint

Self Cite

View full text Add to dashboard Cite

show abstract

Development of Magnetically Soft Amorphous Microwires for Technological Applications

et al. 2022

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Amorphous magnetic microwires can be suitable for a variety of technological applications due to their excellent magnetic softness and giant magnetoimpedance (GMI) effect. Several approaches for optimization of soft magnetic properties and GMI effect of magnetic microwires covered with an insulating, flexible, and biocompatible glass coating with tunable magnetic properties are overviewed. The high GMI effect and soft magnetic properties, achieved even in as-prepared Co-rich microwires with a vanishing magnetostriction coefficient, can be further improved by appropriate heat treatment (including stress-annealing and Joule heating). Although as-prepared Fe-rich amorphous microwires exhibit low GMI ratio and rectangular hysteresis loops, stress-annealing, Joule heating, and combined stress-annealed followed by conventional furnace annealing can substantially improve the GMI effect (by more than an order of magnitude).

show abstract

Electronic Surveillance and Security Applications of Magnetic Microwires

et al. 2021

View full text Add to dashboard Cite

Applications in security and electronic surveillance require a combination of excellent magnetic softness with good mechanical and anticorrosive properties and low dimensionality. We overviewed the feasibility of using glass-coated microwires for electronic article surveillance and security applications, as well as different routes of tuning the magnetic properties of individual microwires or microwire arrays, making them quite attractive for electronic article surveillance and security applications. We provide the routes for tuning the hysteresis loops’ nonlinearity by the magnetostatic interaction between the microwires in the arrays of different types of amorphous microwires. The presence of neighboring microwire (either Fe- or Co-based) significantly affects the hysteresis loop of the whole microwires array. In a microwires array containing magnetically bistable microwires, we observed splitting of the initially rectangular hysteresis loop with a number of Barkhausen jumps correlated with the number of magnetically bistable microwires. Essentially, nonlinear and irregular hysteresis loops have been observed in mixed arrays containing Fe- and Co-rich microwires. The obtained nonlinearity in hysteresis loops allowed to increase the harmonics and tune their magnetic field dependencies. On the other hand, several routes allowing to tune the switching field by either postprocessing or modifying the magnetoelastic anisotropy have been reviewed. Nonlinear hysteresis loops have been also observed upon devitrification of amorphous microwires. Semihard magnetic microwires have been obtained by annealing of Fe–Pt–Si microwires. The observed unique combination of magnetic properties together with thin dimensions and excellent mechanical and anticorrosive properties provide excellent perspectives for the use of glass-coated microwires for security and electronic surveillance applications.

show abstract

Optimization of Magnetic Properties of Magnetic Microwires by Post-Processing

Cited by 9 publications

References 102 publications

Electronic Surveillance and Security Applications of Magnetic Microwires

Electronic Surveillance and Security Applications of Magnetic Microwires

Development of Magnetically Soft Amorphous Microwires for Technological Applications

Electronic Surveillance and Security Applications of Magnetic Microwires

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