Magnetic relaxation in V15 cluster: Direct spin-phonon transitions

Alex Tarantul, Boris Tsukerblat

Research output: Contribution to journalArticlepeer-review

13 Scopus citations


In this article we propose a model of spin-vibronic relaxation in K 6[VIV15As6O42(H 2O)]·8H2O, the so called V15 cluster exhibiting the unique layered structure. The work is motivated by the recent observation of the Rabi oscillation [1] in this system and aimed to elucidate the nature of the relaxation processes. The model assumes that the spin-phonon coupling arises as a result of modulation of the isotropic and antisymmetric (Dzyaloshinsky-Moriya) exchange interactions in the central triangular layer of vanadium ions by the acoustic lattice vibrations. Within the pseudo-angular momentum representation the selection rules for the direct (one-phonon) transitions between Zeeman levels are derived and a special role of the antisymmetric exchange is underlined. The relaxation times related to one-phonon transitions in different ranges of the field are estimated within the Debye model for the lattice vibrations.

Original languageEnglish
Pages (from-to)4361-4367
Number of pages7
JournalInorganica Chimica Acta
Issue number15
StatePublished - 10 Dec 2010


  • Antisymmetric exchange
  • Coherence
  • Exchange interaction
  • Molecular magnetism
  • Spin-phonon relaxation

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Inorganic Chemistry
  • Materials Chemistry


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