Volume 66, Number 3, May 2004
|Page(s)||423 - 429|
|Section||Condensed matter: electronic structure, electrical, magnetic, and optical properties|
|Published online||01 April 2004|
Mechanism of ground-state selection in the frustrated molecular spin cluster
Department of Chemistry, University of Bern - CH-3000 Bern 9, Switzerland
2 Institut Laue-Langevin - BP 156, 38042 Grenoble, France
3 Department of Chemistry, University of Bielefeld - 33501 Bielefeld, Germany
4 Laboratoire de Magnétisme Louis Néel, CNRS - BP 166, 38042 Grenoble, France
Corresponding author: email@example.com
Accepted: 23 February 2004
We report an inelastic neutron scattering (INS) study under a magnetic field on the frustrated molecular spin cluster V15. Several field-dependent transitions are observed and provide a comprehensive understanding of the low-energy quantum spin states. The energy gap between the two lowest Kramers doublets is unambiguously attributed to a symmetry lowering of the cluster. The INS data are mapped onto an Antiferromagnetic Heisenberg triangle with scalene distortion. A quantitative description of the wave function mixing within the ground state is derived.
PACS: 75.30.Et – Exchange and superexchange interactions / 75.50.Xx – Molecular magnets / 78.70.Nx – Neutron inelastic scattering
© EDP Sciences, 2004
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