Ni-site Doping Effect of New Antiperovskite Superconductor ZnNNi<sub>3</sub>

Uehara, M.; Kozawa, Katsuya; Ohashi, M.; Suganuma, Yoshinori; Tadera, S; Yamazaki, Takahiro; Kimishima, Y.

doi:10.1088/1742-6596/400/2/022128

Cited by 3 publications

(3 citation statements)

References 10 publications

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“…In other words, a miscibility gap exists in ZnN y Ni 3−x Co x systems for at least x = 0.25 and 0.5. In an Mn-doped ZnNNi 3−x Mn x system synthesized by the same recipe used in the present study, the superconductivity completely disappeared with a tiny amount (x = 0.05) of doping, which indicated the formation of a uniform solid solution, even with small doping concentrations [40]. This experimental result also reinforces the peculiar character of the Co-doping system and supports the existence of a miscibility gap.…”

Section: Resultssupporting

confidence: 84%

Chemical Phase Separation of Superconductive and Ferromagnetic Domains inZnNNi3−xCox

Yamazaki

Uehara

Kozawa

et al. 2012

Advances in Condensed Matter Physics

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Various ZnNyNi3−xCoxcompounds with differing Co content,x, were synthesized, and their magnetic properties were investigated. Uniform solid solutions could not be obtained at low Co content (x<0.75); instead micrometer-scaled ferromagnetic ZnNyNi0.6Co2.4domains formed embedded within a superconductive ZnNNi3bulk, showing chemical phase separation of superconductive ZnNNi3and ferromagnetic ZnNyNi0.6Co2.4. At intermediate levels of Co concentration (0.75<x<2), this two-phase separation might persist, and the superconductive behavior was strongly suppressed in this composition region. Only at high Co concentration (x>2) the uniform ferromagnetic solid solution ZnNyNi3−xCox(with most likelyy=0.5) formed. The phase separation behavior is intrinsic to the system, reflecting the existence of a miscibility gap in ZnNyNi3−xCoxfor the samples withx<2, and was shown not to be attributable to incomplete synthesis. In the two-phased samples, high-quality granular contact between the superconductor and ferromagnet has been realized, suggesting that the production of useful devices requiring high-quality contacts between superconductors and ferromagnets may be possible by making use of this two-phase situation.

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Section: Resultssupporting

confidence: 84%

Chemical Phase Separation of Superconductive and Ferromagnetic Domains inZnNNi3−xCox

Yamazaki

Uehara

Kozawa

et al. 2012

Advances in Condensed Matter Physics

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“…The extrapolated value of the lattice parameter at x = 0 suggests that the y value in CdC y Ni 3-x Cr x is ~0.95, which corresponds to the expected T c of ~2 K for y = 0.95 [2]. To compare the x = 0 sample with the Cr-doped samples, the CdC y was not suppressed but seemed to slightly increase, though T c for other dopant case was suppressed roughly being proportional to the de Gennes factor of M [11]. In the Co-doped case, chemical phase separation of ZnN y Co 3 and ZnN y Ni 3 was observed [14].…”

Section: Resultsmentioning

confidence: 90%

“…The T c decreases in a manner that roughly obeys the de Gennes factor for other dopants such as V, Fe, Mo, and Cu [11]. The effect of Cr doping in CdC y Ni 3 was also studied.…”

Section: Introductionmentioning

confidence: 99%

Pressure and Cr-Doping Effects of CdC_yNi₃

Iwase¹,

Kimishima²,

Uehara³

2014

Proceedings of the International Conference on Strongly Correlated Electron Systems (SCES2013)

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The superconducting transition temperature (T c ) of CdC y Ni 3 was measured under different pressures. The T c increased at rates of 0.190 and 0.017 K/GPa for samples with y ≈ 0.93 and 0.96, respectively when the pressure was increased. The effect of the pressure on the y ≈ 0.93 sample is the largest among the antiperovskite superconductors. This result can be understood based on the difference between the bulk moduli of the antiperovskite superconductors, except for the y ≈ 0.96 sample. Cr-doped CdC y Ni 3-x Cr x was synthesized and the magnetic susceptibility was measured. The T c increased from 1.87 K at x = 0 to 4 K for x values of 0.7 and 0.8. This result probably arises from a reduction in the carrier concentration, not from the chemical pressure effect by Cr doping.

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First-principles study of the structural, electronic, and magnetic properties of Mn-doped Ni3XN(X=Al, Cu, In) compounds

Wen

Chen

et al. 2021

Solid State Communications

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Ni-site Doping Effect of New Antiperovskite Superconductor ZnNNi₃

Cited by 3 publications

References 10 publications

Chemical Phase Separation of Superconductive and Ferromagnetic Domains inZnNNi3−xCox

Chemical Phase Separation of Superconductive and Ferromagnetic Domains inZnNNi3−xCox

Pressure and Cr-Doping Effects of CdC_yNi₃

First-principles study of the structural, electronic, and magnetic properties of Mn-doped Ni3XN(X=Al, Cu, In) compounds

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Ni-site Doping Effect of New Antiperovskite Superconductor ZnNNi3

Cited by 3 publications

References 10 publications

Chemical Phase Separation of Superconductive and Ferromagnetic Domains inZnNNi3−xCox

Chemical Phase Separation of Superconductive and Ferromagnetic Domains inZnNNi3−xCox

Pressure and Cr-Doping Effects of CdCyNi3

First-principles study of the structural, electronic, and magnetic properties of Mn-doped Ni3XN(X=Al, Cu, In) compounds

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Ni-site Doping Effect of New Antiperovskite Superconductor ZnNNi₃

Pressure and Cr-Doping Effects of CdC_yNi₃