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Effect of the Volume Variation on the Superconductivity of TaSi2

Published online by Cambridge University Press:  15 February 2011

N. Keller ,
O. Laborde ,
U. Gottlieb  and
R. Madar
N. Keller
Affiliation:
Centre de Recherches sur les Très Basses Températures, CNRS, BP 166, 38042 Grenoble Cedex 9, France
O. Laborde
Affiliation:
Laboratoire des Champs Magnétiques Intenses, CNRS, BP 166, 38042 Grenoble Cedex 9, France
U. Gottlieb
Affiliation:
Laboratoire des Matériaux et du Génie Physique, ENSPG, INPG, BP 46, 38402 St. Martin d'Hères, France
R. Madar
Affiliation:
Laboratoire des Matériaux et du Génie Physique, ENSPG, INPG, BP 46, 38402 St. Martin d'Hères, France
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Abstract

TaSi2, and NbSi2 are superconductors below 353 mK and 130 mK respectively. These compounds, like VSi2 which is not superconducting down to 100 mK, crystallise in the C40 structure. They differ by a slight variation of lattice parameters.

We have systematically investigated the superconducting properties of several samples of TaSi2 by magnetic and resistive measurements. A small difference on Tc is observed for the same crystal by the two techniques. Several explanations are presented for this result.

We also report a change of Tc under pressure in good agreement with those resulting of the volume variation for the two C40 superconductors previously studied.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 402: Symposium H – Silicide Thin Films-Fabrication, Properties and Applications , 1995 , 619
Copyright
Copyright © Materials Research Society 1996

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References

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