| Issue |
Europhys. Lett.
Volume 60, Number 2, October 2002
|
|
|---|---|---|
| Page(s) | 302 - 308 | |
| Section | Condensed matter: electronic structure, electrical, magnetic, and optical properties | |
| DOI | https://doi.org/10.1209/epl/i2002-00357-4 | |
| Published online | 01 October 2002 | |
Quantum tunneling in molecular ferric wheels
Physikalisches Institut III, Universität Erlangen-Nürnberg D-91058 Erlangen, Germany
Received:
7
January
2002
Accepted:
5
August
2002
An effective spin Hamiltonian is presented which describes the
low-lying energy spectrum of antiferromagnetic molecular rings with
high accuracy. It will be shown that for the particular case of the
ferric wheels, quantum coherent phenomena are best discussed in terms
of resonant quantum tunneling of the spin vector between different
rotational modes. These quantum processes are associated to
anticrossings of higher-lying spin multiplets with 
.
PACS: 75.10.Jm – Quantized spin models / 75.50.Xx – Molecular magnets / 73.40.Gk – Tunneling
© EDP Sciences, 2002
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