Ferroquadrupolar ordering in PrTi 2Al 20

Taku J. Sato, Soshi Ibuka, Yusuke Nambu, Teruo Yamazaki, Tao Hong, Akito Sakai, Satoru Nakatsuji

Research output: Contribution to journalArticlepeer-review

59 Citations (Scopus)

Abstract

The origin of the nonmagnetic phase transition in PrTi 2Al 20, reported earlier in a macroscopic study, has been asserted microscopically using elastic and inelastic neutron scattering techniques. It has been shown spectroscopically that the crystalline-electric-field ground state is a nonmagnetic Γ 3 doublet, whereas the excited states are two triplets (Γ 4 and Γ 5) and a singlet (Γ 1). The diffraction experiment under external magnetic field shows that the nonmagnetic transition is indeed ferroquadrupolar ordering, which takes place as a consequence of cooperative removal of the ground-state-doublet degeneracy. It is therefore concluded that PrTi 2Al 20 is another rare example of Pr compounds exhibiting nonmagnetic quadrupolar order.

Original languageEnglish
Article number184419
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume86
Issue number18
DOIs
Publication statusPublished - 2012 Nov 16
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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