Spin-lattice relaxation of the Vk-center in LiF

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

Research output: Contribution to journalArticle

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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

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Spin-lattice relaxation
spin-lattice relaxation
Molecular vibrations
intervals
temperature dependence
isotropy
Electron transitions
Excited states
Temperature
Ground state
Modulation
modulation
vibration
ground state
excitation
interactions
temperature

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Spin-lattice relaxation of the Vk-center in LiF. / Vikhnin, V. S.; Gromovoi, Yu S.; Zaritskii, I. M.; Corradi, G.

In: Journal of Physics and Chemistry of Solids, Vol. 39, No. 10, 1978, p. 1113-1118.

Research output: Contribution to journalArticle

Vikhnin, V. S. ; Gromovoi, Yu S. ; Zaritskii, I. M. ; Corradi, G. / Spin-lattice relaxation of the Vk-center in LiF. In: Journal of Physics and Chemistry of Solids. 1978 ; Vol. 39, No. 10. pp. 1113-1118.
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PY - 1978

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N2 - 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.

AB - 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.

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