| Issue |
Europhys. Lett.
Volume 44, Number 6, December II 1998
|
|
|---|---|---|
| Page(s) | 778 - 782 | |
| Section | Condensed matter: electronic structure, electrical, magnetic and optical properties | |
| DOI | https://doi.org/10.1209/epl/i1998-00541-0 | |
| Published online | 01 September 2002 | |
Submillimeter spectroscopy of 
-Ac magnetic clusters
1
General Physics Institute of RAS - 38, Vavilov st., 117942 Moscow, Russia
2
Dipartimento di Chimica, Università di Firenze, Via Maragliano 77, 50144 Firenze, Italy
Received:
3
August
1998
Accepted:
23
October
1998
Transitions inside the ground S= 10 multiplet of magnetic clusters
Mn12-Ac have been observed in submillimeter transmission spectra
measured by means of a quasi-optical backward-wave-oscillator
technique in the frequency range 
–
. The
temperature dependence of the resonance frequencies, linewidths and
mode contributions to the magnetic permeability in the range
T=3–35 K are consistent on the whole with a spin S=10
ground state split by a tetragonal crystal field. However, some
deviations between the calculated and observed mode contributions at
high temperatures suggest the presence of other Mn12-Ac excited
multiplets with 
.
PACS: 76.30.-v – Electron paramagnetic resonance and relaxation / 75.10.Dg – Crystal-field theory and spin Hamiltonians / 75.30.Gw – Magnetic anisotropy
© EDP Sciences, 1998
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