Superconductivity in the ternary germanide Y3Pt 4Ge6

Naoki Kase; Takahiro Muranaka; Jun Akimitsu

doi:10.1143/JPSJ.77.054714

Superconductivity in the ternary germanide Y₃Pt ₄Ge₆

Naoki Kase, Takahiro Muranaka, Jun Akimitsu

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

Abstract

A new superconducting ternary germanide, Y₃Pt₄Ge ₆, was discovered at the transition temperature of 2.6 K by the electrical resistivity and magnetic susceptibility measurements. The magnetization versus magnetic field (M-H) curve indicated that Y ₃Pt₄Ge₆ is a type-II superconductor. The lower critical field H_c1 and the upper critical field H_c2 were estimated to be 53 Oe and 2.73 kOe. The coherence length ξ(0)_GL, penetration depth λ(0)_GL, and Ginzburg-Landau (GL) parameter κ(0) obtained from these values were 347 Å, 3230 Å, and 9.3, respectively. Specific heat measurements revealed that Y₃Pt ₄Ge₆ is a weak-coupling BCS superconductor with an isotropic superconducting gap. The electron-phonon mass enhancement parameter λ_γ was calculated to be 0.19, which was consistent with the weak-coupling limit inferred from the specific jump ΔC _p/γ_nT_c.

Original language	English
Article number	054714
Journal	journal of the physical society of japan
Volume	77
Issue number	5
DOIs	https://doi.org/10.1143/JPSJ.77.054714
Publication status	Published - May 1 2008
Externally published	Yes

Keywords

Electrical resistivity
Specific heat
Superconductivity
Susceptibility
YPtGe

ASJC Scopus subject areas

Physics and Astronomy(all)

Access to Document

10.1143/JPSJ.77.054714

Cite this

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title = "Superconductivity in the ternary germanide Y3Pt 4Ge6",

abstract = "A new superconducting ternary germanide, Y3Pt4Ge 6, was discovered at the transition temperature of 2.6 K by the electrical resistivity and magnetic susceptibility measurements. The magnetization versus magnetic field (M-H) curve indicated that Y 3Pt4Ge6 is a type-II superconductor. The lower critical field Hc1 and the upper critical field Hc2 were estimated to be 53 Oe and 2.73 kOe. The coherence length ξ(0)GL, penetration depth λ(0)GL, and Ginzburg-Landau (GL) parameter κ(0) obtained from these values were 347 {\AA}, 3230 {\AA}, and 9.3, respectively. Specific heat measurements revealed that Y3Pt 4Ge6 is a weak-coupling BCS superconductor with an isotropic superconducting gap. The electron-phonon mass enhancement parameter λγ was calculated to be 0.19, which was consistent with the weak-coupling limit inferred from the specific jump ΔC p/γnTc.",

keywords = "Electrical resistivity, Specific heat, Superconductivity, Susceptibility, YPtGe",

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AU - Kase, Naoki

AU - Muranaka, Takahiro

AU - Akimitsu, Jun

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N2 - A new superconducting ternary germanide, Y3Pt4Ge 6, was discovered at the transition temperature of 2.6 K by the electrical resistivity and magnetic susceptibility measurements. The magnetization versus magnetic field (M-H) curve indicated that Y 3Pt4Ge6 is a type-II superconductor. The lower critical field Hc1 and the upper critical field Hc2 were estimated to be 53 Oe and 2.73 kOe. The coherence length ξ(0)GL, penetration depth λ(0)GL, and Ginzburg-Landau (GL) parameter κ(0) obtained from these values were 347 Å, 3230 Å, and 9.3, respectively. Specific heat measurements revealed that Y3Pt 4Ge6 is a weak-coupling BCS superconductor with an isotropic superconducting gap. The electron-phonon mass enhancement parameter λγ was calculated to be 0.19, which was consistent with the weak-coupling limit inferred from the specific jump ΔC p/γnTc.

AB - A new superconducting ternary germanide, Y3Pt4Ge 6, was discovered at the transition temperature of 2.6 K by the electrical resistivity and magnetic susceptibility measurements. The magnetization versus magnetic field (M-H) curve indicated that Y 3Pt4Ge6 is a type-II superconductor. The lower critical field Hc1 and the upper critical field Hc2 were estimated to be 53 Oe and 2.73 kOe. The coherence length ξ(0)GL, penetration depth λ(0)GL, and Ginzburg-Landau (GL) parameter κ(0) obtained from these values were 347 Å, 3230 Å, and 9.3, respectively. Specific heat measurements revealed that Y3Pt 4Ge6 is a weak-coupling BCS superconductor with an isotropic superconducting gap. The electron-phonon mass enhancement parameter λγ was calculated to be 0.19, which was consistent with the weak-coupling limit inferred from the specific jump ΔC p/γnTc.

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