Thermodynamic and superconducting properties of the C32 intermetallic compounds CaAlSi and SrAlSi

B. Lorenz; J. Cmaidalka; R. L. Meng; Y. Y. Xue; C. W. Chu

doi:10.1016/j.physc.2004.02.066

Thermodynamic and superconducting properties of the C32 intermetallic compounds CaAlSi and SrAlSi

B. Lorenz, J. Cmaidalka, R. L. Meng, Y. Y. Xue, C. W. Chu

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Abstract

We investigate the thermodynamic and superconducting properties of the intermetallic C32 compounds CaAlSi and SrAlSi. The heat capacity of SrAlSi follows the BCS-theory for weak coupling, but the data for CaAlSi indicate an enhanced coupling strength in the latter compound. The characteristic parameters of the normal and superconducting states are evaluated. The effect of high pressure on T_c is positive in CaAlSi but negative in SrAlSi. The opposite signs of the pressure coefficients of T_c indicate distinct differences in the electronic structure at the Fermi energy.

Original language	English
Pages (from-to)	171-172
Number of pages	2
Journal	Physica C: Superconductivity and its applications
Volume	408-410
Issue number	1-4
DOIs	https://doi.org/10.1016/j.physc.2004.02.066
Publication status	Published - 2004 Aug
Event	Proceedings of the International Conference on Materials - Rio de Janeiro, Brazil Duration: 2003 May 25 → 2003 May 30

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

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10.1016/j.physc.2004.02.066

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title = "Thermodynamic and superconducting properties of the C32 intermetallic compounds CaAlSi and SrAlSi",

abstract = "We investigate the thermodynamic and superconducting properties of the intermetallic C32 compounds CaAlSi and SrAlSi. The heat capacity of SrAlSi follows the BCS-theory for weak coupling, but the data for CaAlSi indicate an enhanced coupling strength in the latter compound. The characteristic parameters of the normal and superconducting states are evaluated. The effect of high pressure on Tc is positive in CaAlSi but negative in SrAlSi. The opposite signs of the pressure coefficients of Tc indicate distinct differences in the electronic structure at the Fermi energy.",

author = "B. Lorenz and J. Cmaidalka and Meng, {R. L.} and Xue, {Y. Y.} and Chu, {C. W.}",

note = "Funding Information: This work is supported in part by NSF grant no. DMR-9804325, the T.L.L. Temple Foundation, the J. J. and R. Moores Endowment, and the State of Texas through the TCSAM and at LBNL by the Director, Office of Energy Research, Office of Basic Energy Sciences, Division of Materials Sciences of the US Department of Energy under contract no. DE-AC03-76SF00098.; Proceedings of the International Conference on Materials ; Conference date: 25-05-2003 Through 30-05-2003",

year = "2004",

month = aug,

doi = "10.1016/j.physc.2004.02.066",

language = "English",

volume = "408-410",

pages = "171--172",

journal = "Physica C: Superconductivity and its applications",

issn = "0921-4534",

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TY - JOUR

T1 - Thermodynamic and superconducting properties of the C32 intermetallic compounds CaAlSi and SrAlSi

AU - Lorenz, B.

AU - Cmaidalka, J.

AU - Meng, R. L.

AU - Xue, Y. Y.

AU - Chu, C. W.

N1 - Funding Information: This work is supported in part by NSF grant no. DMR-9804325, the T.L.L. Temple Foundation, the J. J. and R. Moores Endowment, and the State of Texas through the TCSAM and at LBNL by the Director, Office of Energy Research, Office of Basic Energy Sciences, Division of Materials Sciences of the US Department of Energy under contract no. DE-AC03-76SF00098.

PY - 2004/8

Y1 - 2004/8

N2 - We investigate the thermodynamic and superconducting properties of the intermetallic C32 compounds CaAlSi and SrAlSi. The heat capacity of SrAlSi follows the BCS-theory for weak coupling, but the data for CaAlSi indicate an enhanced coupling strength in the latter compound. The characteristic parameters of the normal and superconducting states are evaluated. The effect of high pressure on Tc is positive in CaAlSi but negative in SrAlSi. The opposite signs of the pressure coefficients of Tc indicate distinct differences in the electronic structure at the Fermi energy.

AB - We investigate the thermodynamic and superconducting properties of the intermetallic C32 compounds CaAlSi and SrAlSi. The heat capacity of SrAlSi follows the BCS-theory for weak coupling, but the data for CaAlSi indicate an enhanced coupling strength in the latter compound. The characteristic parameters of the normal and superconducting states are evaluated. The effect of high pressure on Tc is positive in CaAlSi but negative in SrAlSi. The opposite signs of the pressure coefficients of Tc indicate distinct differences in the electronic structure at the Fermi energy.

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U2 - 10.1016/j.physc.2004.02.066

DO - 10.1016/j.physc.2004.02.066

M3 - Conference article

AN - SCOPUS:4344659966

SN - 0921-4534

VL - 408-410

SP - 171

EP - 172

JO - Physica C: Superconductivity and its applications

JF - Physica C: Superconductivity and its applications

IS - 1-4

T2 - Proceedings of the International Conference on Materials

Y2 - 25 May 2003 through 30 May 2003

ER -

Thermodynamic and superconducting properties of the C32 intermetallic compounds CaAlSi and SrAlSi

Abstract

All Science Journal Classification (ASJC) codes

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