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

Research output: Contribution to journalArticlepeer-review

201 Citations (Scopus)


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
Issue number5
Publication statusPublished - May 1 2003
Externally publishedYes


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

ASJC Scopus subject areas

  • Physics and Astronomy(all)


Dive into the research topics of 'Evidence for magnetic-field-induced quadrupolar ordering in the heavy-fermion superconductor PrOs<sub>4</sub>Sb<sub>12</sub>'. Together they form a unique fingerprint.

Cite this