Engineering of magnetic softness and giant magnetoimpedance effect in Fe-rich microwires by stress-annealing

Zhukova, V.; Blanco, J.M.; Ipatov, M.; González, J.; Churyukanova, M.; Zhukov, А.

doi:10.1016/j.scriptamat.2017.08.014

Cited by 71 publications

(71 citation statements)

References 32 publications

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“…However, the beneficial influence of stress-annealing on magnetic softness and the GMI effect is recently reported for Fe-rich microwires with large and positive magnetostriction coefficient [42,43]. A remarkable improvement in magnetic softness and the GMI effect is attributed to stress-annealing-induced transverse magnetic anisotropy [42,43].…”

Section: Introductionmentioning

confidence: 99%

“…The origin of such magnetic hardening was attributed either to the influence of internal stresses on magnetostriction coefficient (and therefore magnetostriction change upon annealing) [39][40][41] or the modification of the domain structure after thermal treatment [41]. However, the beneficial influence of stress-annealing on magnetic softness and the GMI effect is recently reported for Fe-rich microwires with large and positive magnetostriction coefficient [42,43]. A remarkable improvement in magnetic softness and the GMI effect is attributed to stress-annealing-induced transverse magnetic anisotropy [42,43].…”

Section: Introductionmentioning

confidence: 99%

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Optimization of magnetic properties and GMI effect of Thin Co-rich Microwires for GMI Microsensors

González-Legarreta

Corte-León

Zhukova

et al. 2020

Sensors

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Magnetic microwires can present excellent soft magnetic properties and a giant magnetoimpedance effect. In this paper, we present our last results on the effect of postprocessing allowing optimization of the magnetoimpedance effect in Co-rich microwires suitable for magnetic microsensor applications. Giant magnetoimpedance effect improvement was achieved either by annealing or stress-annealing. Annealed Co-rich presents rectangular hysteresis loops. However, an improvement in magnetoimpedance ratio is observed at fairly high annealing temperatures over a wide frequency range. Application of stress during annealing at moderate values of annealing temperatures and stress allows for a remarkable decrease in coercivity and increase in squareness ratio and further giant magnetoimpedance effect improvement. Stress-annealing, carried out at sufficiently high temperatures and/or stress allowed induction of transverse magnetic anisotropy, as well as magnetoimpedance effect improvement. Enhanced magnetoimpedance ratio values for annealed and stress-annealed samples and frequency dependence of the magnetoimpedance are discussed in terms of the radial distribution of the magnetic anisotropy. Accordingly, we demonstrated that the giant magnetoimpedance effect of Co-rich microwires can be tailored by controlling the magnetic anisotropy of Co-rich microwires, using appropriate thermal treatment.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Optimization of magnetic properties and GMI effect of Thin Co-rich Microwires for GMI Microsensors

González-Legarreta

Corte-León

Zhukova

et al. 2020

Sensors

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“…The origin of induced anisotropy in amorphous materials is commonly associated to either pair ordering or back stresses [1,39,40,[44][45][46]. Consequently remarkable changes of magnetic properties are expected for amorphous materials containing more than one transition metal.…”

Section: Tuning Of Magnetic Properties In Magnetic Microwires By Thermentioning

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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“…Studies of the GMI effect attracted the attention of researchers and engineers in recent years owing to excellent impedance sensitivity of external magnetic field (up to 10%/A/m): the largest one among non-cryogenic effects [10][11][12]. Up to now the highest GMI ratio (up to 650%) is reported for properly prepared and processed amorphous microwires [13][14][15].…”

Section: Introductionmentioning

confidence: 99%

“…It is widely accepted that the origin of the GMI effect is related to the skin effect of magnetically soft conductors [7][8][9][10][11][12]. However, for high enough frequencies, the domain walls are strongly dampened.…”

Section: Introductionmentioning

confidence: 99%

The Development of ASIC Type GSR Sensor Driven by GHz Pulse Current

Honkura¹,

Honkura²

2020

Sensors

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The GigaHertz spin rotation (GSR) effect was observed through the excitement of Giga Hertz (GHz) pulse current flowing through amorphous wire. The GSR sensor that was developed provides excellent features that enhanced magnetic sensitivity and sine functional relationship, as well as good linearity, absence of hysteresis, and low noise. Considering the GHz frequency range used for the GSR sensor, we assume that the physical phenomena associated with the operation of the sensor are based on spin reduction and rotation of the magnetization. The proper production technology needed was developed and a micro-sized GSR sensor was produced by directly forming micro coils on the surface of the application-specific integrated circuit (ASIC). Some prototypes of the ASIC type GSR sensor have been produced in consideration of applications such as automotive use, mobile device use, and medical use. Therefore, we can conclude that GSR sensors have great potential to become promising magnetic sensors for many applications.

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Engineering of magnetic softness and giant magnetoimpedance effect in Fe-rich microwires by stress-annealing

Cited by 71 publications

References 32 publications

Optimization of magnetic properties and GMI effect of Thin Co-rich Microwires for GMI Microsensors

Optimization of magnetic properties and GMI effect of Thin Co-rich Microwires for GMI Microsensors

Engineering of Magnetic Properties of Magnetic Microwires

The Development of ASIC Type GSR Sensor Driven by GHz Pulse Current

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