Studies on metal-insulator transition of pyrochlore compound Y2-xBixRu2O7

Shunsuke Yoshii, Masatoshi Sato

Research output: Contribution to journalArticle

55 Citations (Scopus)

Abstract

Various physical properties of Y2-xBixRu2O7 have been studied. The critical temperature TG of a spin-glass transition observed in the system decreases with x and goes to zero at x = xc in the region of the insulator-metal phase boundary. The low temperature specific heat coefficient γ increases with decreasing x from 2.0, has a maximum at xc and decreases with further decreasing x. In Y2Ru2O7, there exists a significant specific heat anomaly at TG. Because the anomaly does not depend on the applied magnetic field, it seems to be due to a structural phase transition, suggesting that the spin-glass transition is induced by this transition. By detailed studies on the relationship between the transport properties and the transition temperatures TG of Y2-xMxRu2O7 (M=Bi, Lu and Ca) and Y2Ru2-xTixO7. an intimate correlation of the itinerant nature with the structural transition is pointed out.

Original languageEnglish
Pages (from-to)3034-3040
Number of pages7
Journaljournal of the physical society of japan
Volume68
Issue number9
DOIs
Publication statusPublished - 1999 Jan 1

Keywords

  • Metal-insulator transition
  • Specific heat
  • Spin glass and structural transitions
  • Transport and magnetic properties
  • YBiRuO

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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