Superconducting properties of CdCNi3

Masatomo Uehara; Takahiro Yamazaki; Tatsuya Kôri; Takeshi Kashida; Yoshihide Kimishima; Izumi Hase

doi:10.1143/JPSJ.76.034714

Superconducting properties of CdCNi₃

Masatomo Uehara, Takahiro Yamazaki, Tatsuya Kôri, Takeshi Kashida, Yoshihide Kimishima, Izumi Hase

Research Institute for Science and Technology

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

77 Citations (Scopus)

Abstract

CdCNi₃ is a newly synthesized superconductor with T_c = 2.5-3.2 K. The crystal has the same perovskite-type structure as MgCNi ₃ but the lattice constant is ∼1% larger than that of MgCNi ₃. For this material, superconducting parameters, lower critical field H_c1(0), upper critical field H_c2(0), coherence length ξ(0), penetration depth λ(0), Ginzburg-Landau parameter κ(0), electronic specific heat coefficient γ, and Debye temperature Θ_D have been experimentally determined. Also, full-potential augmented plane wave band calculation has been performed for CdCNi₃. From experimental and band calculation results, it has been suggested that the smaller density of states at the Fermi energy and enhanced ferromagnetic correlation reduce the T_c of CdCNi₃, compared with that of MgCNi₃.

Original language	English
Article number	034714
Journal	journal of the physical society of japan
Volume	76
Issue number	3
DOIs	https://doi.org/10.1143/JPSJ.76.034714
Publication status	Published - Mar 2007

Keywords

CdCNi
FLAPW band calculation
Specific heat measurement
Superconducting parameter
Superconductivity

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10.1143/JPSJ.76.034714

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abstract = "CdCNi3 is a newly synthesized superconductor with Tc = 2.5-3.2 K. The crystal has the same perovskite-type structure as MgCNi 3 but the lattice constant is ∼1% larger than that of MgCNi 3. For this material, superconducting parameters, lower critical field Hc1(0), upper critical field Hc2(0), coherence length ξ(0), penetration depth λ(0), Ginzburg-Landau parameter κ(0), electronic specific heat coefficient γ, and Debye temperature ΘD have been experimentally determined. Also, full-potential augmented plane wave band calculation has been performed for CdCNi3. From experimental and band calculation results, it has been suggested that the smaller density of states at the Fermi energy and enhanced ferromagnetic correlation reduce the Tc of CdCNi3, compared with that of MgCNi3.",

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AU - Uehara, Masatomo

AU - Yamazaki, Takahiro

AU - Kôri, Tatsuya

AU - Kashida, Takeshi

AU - Kimishima, Yoshihide

AU - Hase, Izumi

PY - 2007/3

Y1 - 2007/3

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AB - CdCNi3 is a newly synthesized superconductor with Tc = 2.5-3.2 K. The crystal has the same perovskite-type structure as MgCNi 3 but the lattice constant is ∼1% larger than that of MgCNi 3. For this material, superconducting parameters, lower critical field Hc1(0), upper critical field Hc2(0), coherence length ξ(0), penetration depth λ(0), Ginzburg-Landau parameter κ(0), electronic specific heat coefficient γ, and Debye temperature ΘD have been experimentally determined. Also, full-potential augmented plane wave band calculation has been performed for CdCNi3. From experimental and band calculation results, it has been suggested that the smaller density of states at the Fermi energy and enhanced ferromagnetic correlation reduce the Tc of CdCNi3, compared with that of MgCNi3.

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KW - Superconducting parameter

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Superconducting properties of CdCNi₃

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Keywords

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