Crystalline-electric field of Pr ( Os1 - x Rux )4 Sb12

H. Akita, G. Yoshino, A. Ochiai

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

High-quality single crystals of Pr ( Os1 - x Rux )4 Sb12 were grown by the Sb self-flux method. Magnetic susceptibility χ ( T ) was measured precisely. The characteristic temperature Tmax, where χ ( T ) exhibits a maximum, varies as a function of Ru-content x but its functional form changes at around x = 0.6 where competition of two types of superconductivity is suggested. Since Tmax is thought to be relevant to the splitting energy between a ground state and a first excited state, we analyzed χ ( T ) considering the crystalline electric field (CEF) of the Th symmetry. χ ( T ) is well fitted assuming a Γ1 singlet ground state for all x values. As expected from Tmax, the energy of the first excited state ( Γ4( 2 )) changes its functional form at around x = 0.6. Furthermore, the energies of the second and third excited states ( Γ4( 1 ) and Γ23) exhibit a minimum at almost the same value of x = 0.6. These results suggest that the CEF is related to the superconductivity in Pr ( Os1 - x Rux )4 Sb12.

Original languageEnglish
Pages (from-to)197-198
Number of pages2
JournalPhysica B: Condensed Matter
Volume378-380
Issue numberSPEC. ISS.
DOIs
Publication statusPublished - 2006 May 1

Keywords

  • Crystalline electric field
  • Magnetic susceptibility
  • Pr ( Os Ru ) Sb

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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