Effect of stress on the bamboo domains and magnetization process of CoSiB amorphous wire

Nderu, J. N.; Takajo, M.; Yamasaki, J.; Humphrey, F. B.

doi:10.1109/20.706532

Cited by 19 publications

(17 citation statements)

References 3 publications

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“…However, the rediscovery of giant magnetoimpedance, GMI [17,18], (primary discovered in permalloy crystalline wires [19]) stimulated extensive research on the development of magnetically soft wires [20][21][22][23][24]. Particularly, a GMI ratio up to 650% has been achieved in Co-rich glass-coated microwires, either by precise control of the chemical composition and the preparation parameters [25] or by the appropriate postprocessing [26][27][28]. The development of such microwires allows us to achieve extremely high magnetic field sensitivity (up to 10 %/A/m) [26][27][28].…”

Section: Introductionmentioning

confidence: 99%

“…Particularly, a GMI ratio up to 650% has been achieved in Co-rich glass-coated microwires, either by precise control of the chemical composition and the preparation parameters [25] or by the appropriate postprocessing [26][27][28]. The development of such microwires allows us to achieve extremely high magnetic field sensitivity (up to 10 %/A/m) [26][27][28].…”

Section: Introductionmentioning

confidence: 99%

“…Generally, amorphous wires present soft magnetic properties. However, the best magnetic softness is reported in Co-rich amorphous microwires with nearly-zero magnetostriction coefficient, λ s [22][23][24][25][26][27][28][29]. The magnetic softness of crystalline magnetic materials is affected by their crystalline structure, various types of defects, grain size and boundaries, texture, etc.…”

Section: Introductionmentioning

confidence: 99%

“…High circumferential magnetic permeability of Co-rich microwires is commonly attributed to the bamboo-like domain structure of the outer domain shell [28,29].…”

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%

Section: Introductionmentioning

confidence: 99%

“…High circumferential magnetic permeability of Co-rich microwires is commonly attributed to the bamboo-like domain structure of the outer domain shell [28,29].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

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

González-Legarreta

Corte-León

Zhukova

et al. 2020

Sensors

View full text Add to dashboard Cite

show abstract

“…3,4 It is supposed that the outer shell of the Co-rich wire has the magnetization with a roughly circular direction and complex multidomain structure. 10,11 Co-rich magnetorestrictive wires also exhibit magnetic bistable behavior. 5,6 The local easy magnetization axes are determined by the magnetoelastic anisotropy resulting from the coupling between the internal stresses and the magnetostriction.…”

mentioning

confidence: 99%