Signature of pressure-induced phase separation in Ce1-xLaxRu2 system

F. Ono, N. Q. Sun, Y. Matsushima, N. L. Saini

Research output: Contribution to journalArticle

Abstract

The Ce1-xLaxRu2 system has been studied for its superconducting and normal-state properties by high-pressure ac-susceptibility measurements as a function of temperature in the range of 4.3-300 K using a cubic anvil pressure cell. The CeRu2 compound shows a sharp transition at the Tc that becomes wider with increasing pressure, getting as wide as ∼1.8 K at a pressure of 7.5 GPa. The transition for the Ce0.91La0.09Ru2 appears with a width of ∼0.7 K (about 3 times wider than that for the CeRu2 at 0.5 GPa) and gets wider with increasing pressure, similar to the case of the CeRu2 system. The pressure-dependent broadening and anomalous Tc behavior of the Ce1-xLaxRu2 could be related to the Fermi surface topological instability that drives the system to get phase separated in the superconducting and weakly antiferromagnetic domains.

Original languageEnglish
Pages (from-to)2144-2148
Number of pages5
JournalJournal of Physics and Chemistry of Solids
Volume67
Issue number9-10
DOIs
Publication statusPublished - Sep 1 2006

Keywords

  • A. Superconductors
  • C. High pressure
  • D. Superconductivity

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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