Specific heat study of (Mg0.85Zn0.15)CNi3 and MgCNi3

S. H. Park; Y. W. Lee; J. Giim; Sung Hoon Jung; H. C. Ri; E. J. Choi

doi:10.1016/j.physc.2003.08.004

Specific heat study of (Mg_0.85Zn_0.15)CNi₃ and MgCNi₃

S. H. Park, Y. W. Lee, J. Giim, Sung Hoon Jung, H. C. Ri, E. J. Choi

Department of Physics

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

14 Scopus citations

Abstract

We have measured the specific heat capacity of MgCNi₃ and (Mg_0.85Zn_0.15)CNi₃ in the temperature range of 0.5 K < T < 10 K with magnetic fields up to 9 T. After the Zn impurity incorporation, T_c of (Mg_0.85Zn_0.15)CNi ₃ decreases but the temperature dependence of specific heat remains BCS-like. We show that the data for the two samples are identical when scaled with T_c. This result excludes possible unconventional features theoretically proposed, such as impurity-induced low-energy bound state. Our data suggest that MgCNi₃ is a conventional BCS superconductor.

Original language	English
Pages (from-to)	160-164
Number of pages	5
Journal	Physica C: Superconductivity and its Applications
Volume	400
Issue number	3-4
DOIs	https://doi.org/10.1016/j.physc.2003.08.004
State	Published - 1 Jan 2004

Keywords

Doping
Impurity
MgCNi
Thermodynamic

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10.1016/j.physc.2003.08.004

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title = "Specific heat study of (Mg0.85Zn0.15)CNi3 and MgCNi3",

abstract = "We have measured the specific heat capacity of MgCNi3 and (Mg0.85Zn0.15)CNi3 in the temperature range of 0.5 K < T < 10 K with magnetic fields up to 9 T. After the Zn impurity incorporation, Tc of (Mg0.85Zn0.15)CNi 3 decreases but the temperature dependence of specific heat remains BCS-like. We show that the data for the two samples are identical when scaled with Tc. This result excludes possible unconventional features theoretically proposed, such as impurity-induced low-energy bound state. Our data suggest that MgCNi3 is a conventional BCS superconductor.",

keywords = "Doping, Impurity, MgCNi, Thermodynamic",

author = "Park, {S. H.} and Lee, {Y. W.} and J. Giim and Jung, {Sung Hoon} and Ri, {H. C.} and Choi, {E. J.}",

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TY - JOUR

T1 - Specific heat study of (Mg0.85Zn0.15)CNi3 and MgCNi3

AU - Park, S. H.

AU - Lee, Y. W.

AU - Giim, J.

AU - Jung, Sung Hoon

AU - Ri, H. C.

AU - Choi, E. J.

PY - 2004/1/1

Y1 - 2004/1/1

N2 - We have measured the specific heat capacity of MgCNi3 and (Mg0.85Zn0.15)CNi3 in the temperature range of 0.5 K < T < 10 K with magnetic fields up to 9 T. After the Zn impurity incorporation, Tc of (Mg0.85Zn0.15)CNi 3 decreases but the temperature dependence of specific heat remains BCS-like. We show that the data for the two samples are identical when scaled with Tc. This result excludes possible unconventional features theoretically proposed, such as impurity-induced low-energy bound state. Our data suggest that MgCNi3 is a conventional BCS superconductor.

AB - We have measured the specific heat capacity of MgCNi3 and (Mg0.85Zn0.15)CNi3 in the temperature range of 0.5 K < T < 10 K with magnetic fields up to 9 T. After the Zn impurity incorporation, Tc of (Mg0.85Zn0.15)CNi 3 decreases but the temperature dependence of specific heat remains BCS-like. We show that the data for the two samples are identical when scaled with Tc. This result excludes possible unconventional features theoretically proposed, such as impurity-induced low-energy bound state. Our data suggest that MgCNi3 is a conventional BCS superconductor.

KW - Doping

KW - Impurity

KW - MgCNi

KW - Thermodynamic

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U2 - 10.1016/j.physc.2003.08.004

DO - 10.1016/j.physc.2003.08.004

M3 - Article

AN - SCOPUS:0242468122

SN - 0921-4534

VL - 400

SP - 160

EP - 164

JO - Physica C: Superconductivity and its Applications

JF - Physica C: Superconductivity and its Applications

IS - 3-4

ER -

Specific heat study of (Mg_0.85Zn_0.15)CNi₃ and MgCNi₃

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Keywords

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