Quadrupole ordering and multipole interactions in Pr-based compounds

T. Sakakibara, T. Tayama, T. Onimaru, D. Aoki, Y. Onuki, H. Sugawara, Y. Aoki, H. Sato

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Field-temperature phase diagrams of cubic compounds PrPb3 and PrOs4Sb12 with non-magnetic crystalline electric field (CEF) ground state have been examined by means of low-temperature magnetization measurements. PrPb3 is a typical Γ3 doublet CEF ground state system which undergoes an antiferro-quadrupole (AFQ) transition at TQ = 0.4 K. In a magnetic field TQ(H) exhibits re-entrant behaviour depending on the field direction, which can be interpreted in terms of interactions between induced dipole (and possibly octupole) moments in the AFQ phase. In the heavy-electron superconductor PrOs4Sb12, a field-induced ordered state has been observed above 4 T for all the principal directions. The results are in favour of a Γ1 CEF ground state model in which a level crossing with a Γ5 triplet excited state induces a long-range (possibly quadrupolar) ordering in a magnetic field.

Original languageEnglish
Pages (from-to)S2055-S2061
JournalJournal of Physics Condensed Matter
Issue number28
Publication statusPublished - 2003 Jul 23

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

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    Sakakibara, T., Tayama, T., Onimaru, T., Aoki, D., Onuki, Y., Sugawara, H., Aoki, Y., & Sato, H. (2003). Quadrupole ordering and multipole interactions in Pr-based compounds. Journal of Physics Condensed Matter, 15(28), S2055-S2061. https://doi.org/10.1088/0953-8984/15/28/325