Ultrasonic study of Kondo compounds Cexla1-xB6 (0.60 ≤ x ≤ 0.75)

O. Suzuki, T. Goto, S. Nakamura, S. Kunii

Research output: Contribution to journalConference articlepeer-review


We have performed the ultrasonic measurements to examine systematic change of the magnetic-phase diagrams of the Kondo compound CexLa1-xB6 with the Γ8 ground state as a function of cerium concentration x. A long-range ordered phase IV is observed in addition to an antiferroquadrupolar phase II and an antiferromagnetic phase III in the compounds of x = 0.75, 0.70 and 0.65. The huge softenings of C44 in phase IV indicate considerable enhancement of the quadrupolar fluctuation with Γ5 symmetry. With decreasing cerium concentration x, the ground state of CexLa1-xB6 at low temperatures under low-magnetic fields changes from the ordered phase IV to a non-magnetic state due to the Kondo effect in vicinity of x ∼ 0.60.

Original languageEnglish
Pages (from-to)563-565
Number of pages3
JournalPhysica B: Condensed Matter
Publication statusPublished - 2000
EventYamada Conference LI - The International Conference on Strongly Correlated Electron Systems (SCES '99) - Nagano, Japan
Duration: 1999 Aug 241999 Aug 28


  • (Ce,La)B
  • Elastic constants
  • Quadrupolar effect


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