The authors have applied torque magnetometry to the study of magnetic anisotropy in six- and ten-membered rings of iron(III) ions. By using magnetic fields up to 23 T, the authors have partially overridden the intramol. antiferromagnetic ordering of the spins (J = 20.0 cm-1 and 9.6 cm-1 in Fe6 and Fe10, resp.) to obtain magnetic ground states with S = 1, 2, 3, etc.,. Torque measurements on microgram single crystals at temps. down to 0.45 K showed that spin-flip transitions are accompanied by sharp variations of magnetic anisotropy. The angular dependence of transition fields provided spectroscopic-quality information about the spin-Hamiltonian parameters in the two compds. By analyzing the field dependence of the torque signal the authors detd. the exchange energies and zero-field splitting parameters of the total-spin multiplets with S ≤ 5 in the Fe10 sample. Torque magnetometry represents a high-sensitivity, powerful technique for studying field-induced level crossing in mol. magnets.
Anno di pubblicazione: | 1999 |
Titolo: | High-field Torque Magnetometry on Fe6 and Fe10 Molecular Magnets |
Autore/i: | A. Cornia; A.G.M. Jansen; M. Affronte |
Autore/i UNIMORE: | |
Rivista: | |
Volume: | 335 |
Pagina iniziale: | 401 |
Pagina finale: | 411 |
Codice identificativo ISI: | WOS:000083449600039 |
Codice identificativo Scopus: | 2-s2.0-0033318530 |
Tipologia | Articolo su rivista |
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