Evidence for magnetic-field-induced quadrupolar ordering in the heavy-fermion superconductor PrOs4Sb12

Masahumi Kohgi, Kazuaki Iwasa, Motoki Nakajima, Naoto Metoki, Shingo Araki, Nick Bernhoeft, Jean Michel Mignot, Arsen Gukasov, Hideyuki Sato, Yuji Aoki, Hitoshi Sugawara

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194 Citations (Scopus)

Abstract

Neutron diffraction experiments on the heavy-fermion superconductor PrOs4Sb12 revealed that a small antiferromagnetic moment, parallel to [010] (γ-direction), is induced in the field-induced phase (H ∥ z). The analysis, based on the Γ1 singlet ground state crystal field model, shows that antiferro-order of Oyz-type quadrupole moments of Pr ions is formed in the field-induced phase. This strongly suggests that the crystal field ground-state of Pr ions in PrOs 4Sb12 is the Γ1 singlet and the quadrupolar ordering is induced due to level crossing with an excited state under a magnetic field.

Original languageEnglish
Pages (from-to)1002-1005
Number of pages4
Journaljournal of the physical society of japan
Volume72
Issue number5
DOIs
Publication statusPublished - 2003 May 1

Keywords

  • Heavy fermion
  • Huperconductivity
  • Neutron diffraction
  • PrOsSb
  • Quadrupolar ordering

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Kohgi, M., Iwasa, K., Nakajima, M., Metoki, N., Araki, S., Bernhoeft, N., Mignot, J. M., Gukasov, A., Sato, H., Aoki, Y., & Sugawara, H. (2003). Evidence for magnetic-field-induced quadrupolar ordering in the heavy-fermion superconductor PrOs4Sb12. journal of the physical society of japan, 72(5), 1002-1005. https://doi.org/10.1143/JPSJ.72.1002