Magnetic, resistive and magnetoresistive properties of melt spun CoCu alloys

Juárez, Gabriel; Villafuerte, M.; Heluani, S. P.; Fabietti, L.M.; Urreta, S.E.

doi:10.1016/j.jmmm.2008.02.009

Cited by 6 publications

(3 citation statements)

References 9 publications

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“…In previous articles [6,17] we have reported that twin-roller meltspinning techniques are suitable to obtain the desired precipitation substructure directly from the melt, in a single step, just by selecting the adequate casting conditions. In the reported results, casting conditions led to a microstructure in which Co coherent precipitates coexist with segregation strips of about 50 nm wave length, exhibiting MR behavior up to 0.8% at 300 K and 0.85 T. This modulation was attributed to spinodal decomposition, despite the predicted XRD configuration for this case (a central peak and two satellite peaks corresponding to the different compositions) is not observed.…”

Section: Introductionmentioning

confidence: 99%

As cast precipitation microstructures in twin-roller melt-spun Cu 90 Co 10 alloys

Núñez-Coavas

López

Condó

et al. 2016

Materials Characterization

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Section: Introductionmentioning

confidence: 99%

As cast precipitation microstructures in twin-roller melt-spun Cu 90 Co 10 alloys

Núñez-Coavas

López

Condó

et al. 2016

Materials Characterization

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“…A number of physical techniques have been used to produce metastable solid solutions of Cu–Co such as arc melting, , mechanical alloying, electrochemical deposition, melt-spinning method, − and ball milling, which show limited solubility of Cu and Co. The copper–cobalt binary system is an immiscible system (no solubility of Cu in Co or Co in Cu) under ambient conditions.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Electrocatalytic Activity of Copper–Cobalt Nanostructures

et al. 2011

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Novel core–shell nanostructures containing Cu and Co have been synthesized using the microemulsion method at 700 °C. The core consists of Cu–Co composite particles, whereas the shell is composed of Cu–Co alloy particles (shell thickness ∼12 nm). It is to be noted that in bulk Cu–Co binary system there is practically no miscibility. TEM studies show formation of spherical-shaped nanoparticles of core–shell structures. The composition of the core (Cu–Co composite) and shell (Cu–Co alloy) were confirmed by XPS studies. The formation of the Cu–Co alloy as the shell is mainly driven by surface energy considerations. We have also obtained Cu–Co nanocomposites (by controlling the concentration of reducing agent) with particle size in the range of 40–200 nm. These Cu–Co nanostructures show ferromagnetic behavior at 4 K. The saturation magnetization of the core–shell (Cu–Co composite @ Cu–Co alloy) nanostructure (125 emu/g) is found to be higher than that of pure Cu–Co nanocomposite or alloy, which may be useful for applications as a soft magnet. Electrochemical studies of these nanocrystalline Cu–Co particles show higher hydrogen evolution efficiencies (∼5 times) compared to bulk (micrometer-sized) Cu–Co alloy particles.

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“…Besides Co/Cu multilayers, granular Co-Cu alloys [18][19][20][21][22] and granular multilayers [2,23] also exhibit GMR. Granular multilayers consisting of layers of grains of ferromagnetic material separated by layers of normal metal, is a border between the granular alloys and the multilayers.…”

Section: Introductionmentioning

confidence: 99%