Biomedical applications of glass-coated microwires

Kozejova, D.; Fecova, L.; Klein, Peter; Sabol, R.; Hudák, Radovan; Šulla, I; Mudronova, D.; Gálik, Ján; Varga, R.

doi:10.1016/j.jmmm.2017.11.004

Cited by 71 publications

(33 citation statements)

References 14 publications

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“…Magnetic wires can be prepared using different techniques involving rapid melt quenching [7,[21][22][23]33]. However, glass-coated magnetic microwires prepared by so-called Taylor-Ulitovsky technique present the widest metallic nucleus diameter range (from 200 nm up to 100 µm) [34][35][36][37][38][39][40][41][42][43][44]. In this way, the Taylor-Ulitovsky method is the unique technique allowing fabrication of nanowires by rapid melt quenching [34].…”

Section: Introductionmentioning

confidence: 99%

Electronic Surveillance and Security Applications of Magnetic Microwires

et al. 2021

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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.

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Section: Introductionmentioning

confidence: 99%

Electronic Surveillance and Security Applications of Magnetic Microwires

et al. 2021

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“…Additional advantages of the Taylor‐Ulitovsky method are almost continuous preparation method (suitable for the preparation of continuous microwires up to 10 km in length) and the presence of a thin flexible and biocompatible glass coating that allows anticorrosive and mechanical properties improvement and the biocompatibility. [ 36–38 ]…”

Section: Introductionmentioning

confidence: 99%

Tailoring of Magnetic Softness and Magnetoimpedance of Co‐Rich Microwires by Stress Annealing

Zhukov

González-Legarreta

Ipatov

et al. 2021

Physica Status Solidi (a)

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Herein, detailed studies on the influence of stress annealing on the magnetic softness and giant magnetoimpedance (GMI) ratio of Co69.2Fe3.6Ni1B12.5Si11Mo1.5C1.2 glass‐coated microwires are provided. As‐prepared microwire presents linear hysteresis loops, moderate GMI ratio with double‐peak magnetic field dependence and low coercivity (4 A m−1), typically observed for wires with transverse magnetic anisotropy. However, after conventional annealing magnetic hardening and transformation of linear hysteresis loop into rectangular with coercivity about 90 A m−1 is surprisingly observed. It is shown that stress annealing allows preventing magnetic hardening and remarkably improving GMI ratio. Properly stress‐annealed samples present better magnetic softness: almost unhysteretic loops with coercivity about 2 A m−1 and magnetic anisotropy field about 35 A m−1. Observed stress‐annealing‐induced anisotropy is affected by the tensile stresses, applied during annealing and by the annealing temperature. From the frequency dependence of the maximum GMI ratio, the optimum frequency ranges for as‐prepared and stress‐annealed samples are determined. The observed stress‐annealing‐induced magnetic anisotropy and associated changes in magnetic properties and GMI effect are discussed in terms of internal stresses relaxation and related modification of the magnetostriction coefficient, “back stresses,” structural anisotropy, redistribution of internal stresses, and change of spatial distribution of magnetic anisotropy.

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“…Over the last decades, magnetic sensors have captivated scientific attention for their technological findings in a broad scope of fields. These applications range from space research, military applications, security systems, high-density magnetic recording and biomedicine [1][2][3][4][5][6]. In this line, the miniaturization of sensors and technological devices opens new routes in the property-to-function conversion.…”

Section: Introductionmentioning

confidence: 99%

Magnetoimpedance Response and Field Sensitivity in Stress-Annealed Co-Based Microwires for Sensor Applications

González-Alonso

González-Legarreta

Corte-León

et al. 2020

Sensors

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Amorphous soft magnetic microwires have attracted much attention in the area of sensor applications due to their excellent properties. In this work, we study the influence of annealing treatments (stress and conventional) in the giant magnetoimpedance (GMI) response and the field sensitivity of the soft magnetic Co69.2Fe3.6Ni1B12.5Si11Mo1.5C1.2 glass-coated microwires. Here we report a remarkable and simultaneous enhancement of GMI effect and field sensitivity. The highest sensitivity of 104%/Oe and the GMI response of 234% were achieved for 300 °C stress-annealed samples at 472 and 236 MPa, respectively. Additionally, we found that stress-annealed microwires exhibit a frequency dependence on maximal GMI response and field sensitivity. These findings are obtained by fine-tuning their magnetoeslastic anisotropies through stress-annealing treatments of as-prepared microwires at the proper temperature and axial applied stress upon annealing. We hope that the results presented here widen the scope of investigations for the future design of soft magnetic materials for sensor purposes.

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Biomedical applications of glass-coated microwires

Cited by 71 publications

References 14 publications

Electronic Surveillance and Security Applications of Magnetic Microwires

Electronic Surveillance and Security Applications of Magnetic Microwires

Tailoring of Magnetic Softness and Magnetoimpedance of Co‐Rich Microwires by Stress Annealing

Magnetoimpedance Response and Field Sensitivity in Stress-Annealed Co-Based Microwires for Sensor Applications

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