Multipole ordering in f electron systems

T. Sakakibara, T. Tayama, K. Tenya, M. Yokoyama, H. Amitsuka, D. Aoki, Y. Ōnuki, Z. Kletowski, S. Kunii

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)


We discuss multipole ordering in two cubic f-electron compounds. Field variation of the antiferroquadrupolar transition temperature TQ in PrPb3 is determined by the specific heat and the magnetization measurements. It is found that TQ(H) shows a pronounced increase for H ∥ 〈 100 〉, which has been successfully explained by the antiferromagnetic interaction between the field-induced staggered moment in the O20(∝ 2Jz2 - Jx2 - Jy2 AFQ phase. From the analysis of the anisotropy in TQ(H), the importance of an octupolar interaction is pointed out. The new ordered state in CexLa1-xB6 (x < 0.8), called phase IV, has been examined by magnetization measurements under uniaxial pressures. A pronounced anisotropy is observed at a relatively weak pressure, and the ordering temperature seems to increase in magnetic field. The results are discussed in view of a possible octupolar ordering in phase IV.

Original languageEnglish
Pages (from-to)1147-1153
Number of pages7
JournalJournal of Physics and Chemistry of Solids
Issue number6-8
Publication statusPublished - 2002


  • A. Intermetallic compounds
  • D. Crystal fields
  • D. Magnetic properties
  • D. Phase transitions


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