Theory of elastic constants for Ce-impurity systems: Effects of second-order deformations

Tomoya Kuromaru, Hiroaki Kusunose, Yoshio Kuramoto

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


Elastic constants of a single-impurity model with the Γ8 ground state is studied with particular attention to the anisotropy induced by external magnetic field. We calculate elastic constants C66 and C44 taking account of deformations to second order. Under external magnetic field, field-induced quadrupole moments affect elastic constants through the coupling with second-order terms of deformations. It is shown, with an appropriate choice of coupling parameters, that the C66 decreases with increasing magnetic field parallel to the (001)-axis. This single-ion model can also explain the splitting of the C44-modes observed in ultrasonic measurement of Ceo.5La0.5B6.

Original languageEnglish
Pages (from-to)521-531
Number of pages11
Journaljournal of the physical society of japan
Issue number2
Publication statusPublished - 2001 Feb 1


  • CeLaB
  • Elastic constants
  • Field-induced quadrupole moment
  • Single-impurity model
  • The second-order deformations
  • The Γ-subspace

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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