Magnetic properties and giant magnetoimpedance in a CoFeSiB glass-covered microwire

Abstract:We overviewed the correlation between the structure, magnetic and transport properties of magnetic microwires prepared by the Taylor-Ulitovsky method involving rapid quenching from the melt and drawing of the composite (metallic core, glass coated) wire. We showed that this method can be useful for the preparation of different families of magnetic microwires: soft magnetic microwires displaying Giant magnetoimpedance (GMI) effect, semi-hard magnetic microwires, microwires with granular structure exhibiting Giant Magnetoresistance (GMR) effect and Heusler-type microwires. Magnetic and transport properties of magnetic microwires depend on the chemical composition of metallic nucleus and on the structural features (grain size, precipitating phases) of prepared microwires. In all families of crystalline microwires, their structure, magnetic and transport properties are affected by internal stresses induced by the glass coating, depending on the quenching rate. Therefore, properties of glass-coated microwires are considerably different from conventional bulk crystalline alloys.

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“…Therefore, the highest GMI ratios are reported for different families of amorphous wires [14][15][16][17]51,52].…”

Section: Optimization Of the Gmi Effect Through The Nanocrystallizatimentioning

confidence: 94%

“…The largest GMI ratio (up to 600%) is reported for nearly-zero magnetostrictive Co-rich amorphous glass-coated microwires [17,51,52].…”

Section: Magnetically Soft Nanocrystalline Glass-coated Microwiresmentioning

confidence: 97%

Correlation of Crystalline Structure with Magnetic and Transport Properties of Glass-Coated Microwires

et al. 2017

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“…In spite of these disadvantages the highest GMI ratios (up to 600%) are reported for Co-rich glass-coated microwires [30,31]. Therefore we focused our research on engineering of magnetic softness, GMI effect and single DW velocity in amorphous and nanocrystalline glass-coated microwires.…”

Section: Introductionmentioning

confidence: 99%

Engineering of Magnetic Properties of Magnetic Microwires

Zhukov

Ipatov²,

Blanco

et al. 2018

Acta Phys. Pol. A

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We present an overview of the factors affecting soft magnetic properties, fast domain wall propagation and giant magnetoimpedance (GMI) effect in thin amorphous wires. The magnetoelastic anisotropy is one of the most important parameters that determine the magnetic properties of glass-coated microwires and therefore annealing can be very effective for manipulation the magnetic properties of amorphous ferromagnetic glass-coated microwires. Increasing of DW velocity in Fe-rich and Fe-Ni based (low Ni content) microwires is achieved after annealing. After heat treatment of Co-rich microwires we can observe transformation of inclined hysteresis loops to rectangular and coexistence of fast magnetization switching and GMI effect in the same sample. On the other hand stress annealing of Fe-and Co-rich microwires allows achievement of considerable magnetic softening and GMI effect enhancement.

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“…The giant magneto-impedance (GMI) effect of these wires which used for weak-field detection and high-resolution sensors has been attracted much attentions [1][2][3] . Many previous works focused on annealing treatment for improving the GMI ratio and field response sensitivity of the microwires simultaneously by releasing the residual inner stress of an as-quenched microwire which enhances the circumferential permeability μ φ , such as joule heat-treatment and stress annealing [4][5][6][7][8] . Based on the definition of GMI ratio, ΔZ∕Z 0 (%)=((Z(H ex )-Z(H 0 ))∕Z(H 0 )×100%, reducing Z 0 is an immediate method to enhance the GMI ratio through annealing treatment while increase the Z max or keep it unchanged.…”

Section: Introductionmentioning

confidence: 99%

Domain Transformation and MI of Melt-extracted Co68.15Fe4.35Si12.25B13.25Nb1Cu1 Microwires by Cryogenic Joule Annealing

et al. 2015

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) achieves to 188.1% with exciting field increasing to 1.8 Oe monotonically for 300 mA annealing treated wires, which can attribute to the surface complex domain structure change formed by CJA treatment. The liquid nitrogen can protect the wire from crystallization when applied large DC currents. Moreover, the CJA treatment can improve the response sensitivities effectively. These remarkable characteristics make the melt-extracted microwires by CJA tailoring as the promising candidate material for small-sized magnetic sensors.

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Magnetic properties and giant magnetoimpedance in a CoFeSiB glass-covered microwire

Cited by 156 publications

References 9 publications

Correlation of Crystalline Structure with Magnetic and Transport Properties of Glass-Coated Microwires

Correlation of Crystalline Structure with Magnetic and Transport Properties of Glass-Coated Microwires

Engineering of Magnetic Properties of Magnetic Microwires

Domain Transformation and MI of Melt-extracted Co68.15Fe4.35Si12.25B13.25Nb1Cu1 Microwires by Cryogenic Joule Annealing

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