Magnetic and structural effects of anelastic deformation of an amorphous alloy

Haimovich, J.; Jagieliński, T.; Egami, T.

doi:10.1063/1.335013

Cited by 76 publications

(45 citation statements)

References 5 publications

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“…The origin of stress-induced anisotropy in amorphous materials is still not clear, although it is discussed in numerous publications [60][61][62]. The most common origin of stress-annealing-induced anisotropy is either "back stresses" or directional pair (chemical or topological) ordering [41][42][43][44][45][46][47][48][49][60][61][62]. Annealing:…”

Section: Resultsmentioning

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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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: Resultsmentioning

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 stress-induced anisotropy of amorphous alloys annealed below crystallization temperatures (300-400°C) has been studied widely. 5,6 Himovich et al 6 studied the structural origin of the anisotropy by using energy dispersive x-ray diffraction. They observed the difference in intensities between the two diffraction vectors ͑parallel and perpendicular to the stress direction͒ and attributed it to the anisotropy in the angular distribution of the atomic bonds in the amorphous structure.…”

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confidence: 99%

Direct evidence for structural origin of stress-induced magnetic anisotropy in Fe–Si–B–Nb–Cu nanocrystalline alloys

Ohnuma

Hono

Yanai

et al. 2003

Applied Physics Letters

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The structural origin of magnetic anisotropy in Fe-Si-B-Nb-Cu alloys annealed under a tensile stress of 200 MPa is studied by transmission x-ray diffraction. The diffraction peak of the ͑310͒ plane, whose normal vector is parallel to the tensile direction ͑ribbon direction͒, appears at a lower angle than the one perpendicular to it by about 0.1°. This indicates that the spacing of the ͑310͒ plane normal to the tensile direction is about 0.2% larger than the one parallel to it. This is direct evidence for the structural origin of the stress-induced magnetic anisotropy of nanocrystalline soft magnetic alloys.

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“…Earlier studies [6,7] had shown that the creep induced anisotropy is due to the anisotropic bond reorientation, which produces anelastic polarization. The present M .…”

Section: Article In Pressmentioning

confidence: 98%

“…Extensive studies performed long ago in order to understand the atomic level origin of the induced anisotropy showed that for field-annealing the origin of this anisotropy is the well-known atomic pair ordering mechanism. In the case of annealing under stress, the latter induces structural anisotropy (directly observed in an energy dispersive X-ray experiment [6,7]), which is due to anelastic polarization produced by mechanical creep which causes that more atomic bonds become oriented perpendicular to the applied tensile stress [6,7]. Then, the magnetic anisotropy manifests itself by the dipolar or anisotropic exchange interactions.…”

Section: Introductionmentioning

confidence: 98%

On the microstructural origin of stress-induced anisotropy in Co67Fe4Mo1.5Si16.5B11 metallic glass

Kane

Gupta

Sarabhai

et al. 2004

Journal of Magnetism and Magnetic Materials

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Magnetic and structural effects of anelastic deformation of an amorphous alloy

Cited by 76 publications

References 5 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

Direct evidence for structural origin of stress-induced magnetic anisotropy in Fe–Si–B–Nb–Cu nanocrystalline alloys

On the microstructural origin of stress-induced anisotropy in Co67Fe4Mo1.5Si16.5B11 metallic glass

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