| Issue |
Europhys. Lett.
Volume 66, Number 3, May 2004
|
|
|---|---|---|
| Page(s) | 423 - 429 | |
| Section | Condensed matter: electronic structure, electrical, magnetic, and optical properties | |
| DOI | https://doi.org/10.1209/epl/i2004-10008-x | |
| Published online | 01 April 2004 | |
Mechanism of ground-state selection in the frustrated
molecular spin cluster 
1
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: chabouss@llb.saclay.cea.fr
Received:
5
January
2004
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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