Spin-lattice relaxation of the Vk-center in LiF

V. S. Vikhnin, Yu S. Gromovoi, I. M. Zaritskii, G. Corradi

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1 Citation (Scopus)

Abstract

The angular and temperature dependences of the spin-lattice relaxation (SLR) rate of Vk-centers in LiF doped with Mg or Ag have been investigated. In the temperature interval 4.2-100 K the results can be fitted by the formula τ-1 = A(θ)T + Be -Δ T with A(0°) = 0.11 sec-1 K-1, A(90°) = 1.3 sec-1 K-1, B = 3 × 105 sec-1 and Δ = (175 ± 15)K. A mechanism for the SLR is considered, assuming the modulation of the hyperfine interaction by phononinduced transitions between the ground and excited states of the resonant molecular vibrations of the Vk-center. This mechanism is found to explain the value, the temperature dependence and the isotropy of τ-1 in the interval T = 20-100 K. The one-phonon SLR mechanisms of the Vk-center in the T < 10 K region are discussed.

Original languageEnglish
Pages (from-to)1113-1118
Number of pages6
JournalJournal of Physics and Chemistry of Solids
Volume39
Issue number10
DOIs
Publication statusPublished - 1978

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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