Dissipation in non-Kramers doublet of PrMg 3

Koji Araki, Terutaka Goto, Keisuke Mitsumoto, Yuichi Nemoto, Mitsuhiro Akatsu, Hiroyuki S. Suzuki, Hiroshi Tanida, Shigeru Takagi, Shadi Yasin, Sergei Zherlitsyn, Joachim Wosnitza

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6 Citations (Scopus)


The low-temperature ultrasonic dispersion in the transverse (C 11 - C 12)/2 mode of PrMg 3 with the non-Kramers-doublet ground state has been investigated in temperatures down to 20 mK. The dispersion is caused by a thermally activated motions characterized by an Arrhenius-type relaxation time of τ = τ 0 exp(E/k BT) with low activation energy, E = 500 mK, and slow attempt time, τ 0 = 8.5 × 10 -10 s. The coupling of the electric quadrupoles of the non-Kramers-doublet ground state to transverse lattice vibrations leads to a vibronic ground state with dissipation. The vibronic state in PrMg 3 releases the entropy of k B ln 2 with lowering temperature across the activation energy. A Kondo-like singlet state due to the binding of the non-Kramers doublet to the lattice vibrations appears at low temperatures far below the activation energy.

Original languageEnglish
Article number023710
Journaljournal of the physical society of japan
Issue number2
Publication statusPublished - 2012 Feb


  • Dissipation
  • Electric quadrupole
  • Kondo-like singlet
  • Non-kramers doublet
  • PrMg
  • Ultrasonic dispersion

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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