Anisotropy of the molecular magnet V15 spin Hamiltonian detected by high-field electron spin resonance

M. Martens, J. Van Tol, N. S. Dalal, S. Bertaina, B. Barbara, B. Tsukerblat, A. Müller, S. Garai, S. Miyashita, I. Chiorescu

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Abstract

The molecular compound K6[V15IVAs6IIIO42(H2O)]  ·â€‰8H2O, in short V15, has shown important quantum effects such as coherent spin oscillations. The details of the spin quantum dynamics depend on the exact form of the spin Hamiltonian. In this study, we present a precise analysis of the intramolecular interactions in V15. To that purpose, we performed high-field electron spin resonance measurements at 120 GHz and extracted the resonance fields as a function of crystal orientation and temperature. The data are compared against simulations using exact diagonalization to obtain the parameters of the molecular spin Hamiltonian.

Original languageEnglish
Article number195439
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume89
Issue number19
DOIs
StatePublished - 27 May 2014

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