Pressure-induced antiferromagnetic order in filled skutterudite PrFe 4P12 studied by single-crystal high-pressure neutron diffraction

Toyotaka Osakabe, Keitaro Kuwahara, Daichi Kawana, Kazuaki Iwasa, Daisuke Kikuchi, Yuji Aoki, Masahumi Kohgi, Hideyuki Sato

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)

Abstract

The order parameter in the pressure-induced insulating phase of the filled skutterudite compound PrFe4P12 has been investigated using a high-pressure single-crystal neutron diffraction technique. Clear evidence of the antiferromagnetic order with the propagation vector q = (1; 0; 0) was observed in the insulating phase above 2.7 GPa. The q = (1; 0; 0) structure is identical with that in the nonmagnetic ordered phase below 2.5 GPa and with the nesting property of the Fermi surface. The observed magnetic moment of the Pr ion is 2μB and almost pressure-independent up to at least 4.2 GPa. The 2μB magnetic moment originates from the dipole in the low-lying quasi-quartet crystal field state. The pressure-induced antiferromagnetic structure at 3.2 GPa is suppressed by applying a magnetic field of about 1.5 T, which is interpreted as a flop of magnetic moments into the alignment of the ferromagnetic state. This brings about a steep decrease in the electrical resistivity due to the disappearance of the antiferromagnetic superstructure.

Original languageEnglish
Article number034711
Journaljournal of the physical society of japan
Volume79
Issue number3
DOIs
Publication statusPublished - 2010 Mar

Keywords

  • Antiferromagnetic order
  • Filled skutterudite
  • High pressure
  • Neutron diffraction
  • PrFeP
  • Single crystal

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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