Superconductivity and anomalous normal state in the CePd sub 2 Si sub 2 /CeNi sub 2 Ge sub 2 system

The unconventional nonmagnetic metal CeNi sub 2 Ge sub 2 is characterised at ambient pressure by temperature dependences of the specific heat and of the resistivity which deviate strongly from standard Fermi-liquid predictions and are reminiscent of the behaviour observed in its sibling system CePd...

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Bibliographic Details
Published in:Physica. B, Condensed matter Condensed matter, 1996-09, Vol.239 (1-2), p.62-66
Main Authors: Grosche, F M, Lister, S J S, Carter, F V, Saxena, S S, Haselwimmer, R K W, Mathur, N D, Julian, S R
Format: Article
Language:English
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Summary:The unconventional nonmagnetic metal CeNi sub 2 Ge sub 2 is characterised at ambient pressure by temperature dependences of the specific heat and of the resistivity which deviate strongly from standard Fermi-liquid predictions and are reminiscent of the behaviour observed in its sibling system CePd sub 2 Si sub 2 above the critical pressure at which magnetic order is suppressed. We have explored the CePd sub 2 Si sub 2 /CeNi sub 2 Ge sub 2 phase diagram in a series of resistivity measurements under high hydrostatic pressure, p. At p > 15 kbar, a new superconducting transition appears below 220 mK in CeNi sub 2 Ge sub 2 and shifts to higher temperatures with increasing pressure, reaching approx400 mK at p approx26 kbar.
ISSN:0921-4526