Electrical resistivity and AC-calorimetric measurements of PrRu4P12 under pressure

  • Miyake A
  • Holmes A
  • Kagayama T
 et al. 
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Abstract

We have studied the effect of pressure in the filled skutterudite PrRu4P12, which shows a metal-insulator (MI) transition at TMI = 63 K, via simultaneous measurements of electrical resistivity (??) and AC-calorimetry (CAC). Schottky-like anomalies in CAC disappear under pressure, suggesting a change of the ground state. The resistivity below TMI is strongly suppressed with increasing pressure, in contrast to the weak pressure dependence of TMI. Above 10 GPa, ?? (T) shows metallic behavior with small anomalies at TMI. We discuss the likely change of ground state in PrRu4P12 with pressure from triplet to singlet. ?? 2007 Elsevier B.V. All rights reserved.

Author-supplied keywords

  • AC-calorimetric measurement
  • Electrical resistivity measurement
  • High pressure
  • PrRu4P12

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