Magnetic and transport properties of granular and Heusler-type glass-coated microwires

Zhukov, А.; García, Carlos; Ilyn, M.; Varga, R.; Val, J. J. del; Granovsky, A. B.; Rodionova, Valeria; Ipatov, M.

doi:10.1016/j.jmmm.2012.02.089

Cited by 33 publications

(14 citation statements)

References 19 publications

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“…After long enough annealing we observed increasing of ∆R/R up to 32% (see Figure 20b). Similar behavior has been observed for Cu95Co5 and Cu80Co20 microwires ( Figure 21) [83,84]. The highest value of ∆R/R ≈ 32% is observed for Cu90Co10 microwires.…”

Section: Granular Co-cu Microwiressupporting

confidence: 83%

“…During the last few years we employed aforementioned Taylor-Ulitovsky method for preparation of long glass-coated microwires from immiscible elements [23,[81][82][83][84][85].…”

Section: Granular Co-cu Microwiresmentioning

confidence: 99%

“…CoxCu100-x (5 ≤ x ≤ 40 at. %) and Cu63Fe37 glass-coated microwires (total diameters, D, up to 80 μm) consisted of metallic nucleus (diameters, d, 1-50 μm) covered by insulating glass shell (thickness from 0.5 μm to 20 μm) have been prepared by the Taylor-Ulitovsky method [38,[81][82][83][84][85].…”

Section: Granular Co-cu Microwiresmentioning

confidence: 99%

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

et al. 2017

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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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Section: Granular Co-cu Microwiressupporting

confidence: 83%

“…During the last few years we employed aforementioned Taylor-Ulitovsky method for preparation of long glass-coated microwires from immiscible elements [23,[81][82][83][84][85].…”

Section: Granular Co-cu Microwiresmentioning

confidence: 99%

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

et al. 2017

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“…After suitable thermal treatments, small singledomain particles of Co or Fe can precipitate. Recently giant magnetoresistance (GMR) effect attributed to the scattering of the electrons on grain boundaries between ferromagnetic grains and paramagnetic matrix has been observed in such compositions [36,47].…”

Section: Thermal Conditions Of Formation Of Cast Microwirementioning

confidence: 99%

Soft Magnetic Wires for Sensor Applications

Zhukova

2016

Novel Functional Magnetic Materials

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First amorphous materials using rapid quenching from the liquid state were prepared nearly 50 years ago [1][2][3][4]. Development of the rapid-quenching technique allowed obtaining of new materials with metastable crystalline, amorphous, nanocrystalline, granular structures with a new combination of physical properties (mechanical, magnetic, electrochemical, etc.) and opening of new fields of research in material science, magnetism, and technology. During the next years, few rapidquenching technologies allowing preparation of different types of rapidly quenched materials have been developed. At the beginning most attention has been paid to studies of planar rapidly quenched materials: rapidly quenched ribbons produced by quenching on the drum [4][5][6].Excellent magnetic softness of amorphous materials obtained by the meltspinning technique has attracted considerable attention, making them very attractive in potential applications in recording head and microtransformer industries. Such magnetic softness originates from the absence of magnetocrystalline anisotropy in these alloys [6].Further development of the rapidly quenching fabrication techniques allowed preparation of rapidly materials with cylindrical symmetry: rapidly quenched wires [7][8][9][10]. Amorphous wires, typically around 125 μm in diameter, obtained by the so-called in-rotating-water quenching technique, have been firstly introduced in 1980.The magnetostrictive compositions exhibit rectangular hysteresis loop, while the best magnetic softness is observed for the nearly zero magnetostriction composition.

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“…Recent studies demonstrated that essentially the same fabrication technique allows obtaining of microwires with granular structure exhibiting giant magnetoresistance (GMR) effect [7,13,14], Heusler-type microwires [14,15] and microwires with magnetocaloric effect [15,16]. In latter cases the composition of metallic nucleus was different from the case of amorphous magnetically soft microwires.…”

Section: Introductionmentioning

confidence: 99%