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High-field ground-state level crossing and magnetic susceptibility of an {Fe-8}-cubane cluster

TitleHigh-field ground-state level crossing and magnetic susceptibility of an {Fe-8}-cubane cluster
Publication TypeJournal Article
Year of Publication2009
AuthorsMatsuo A, Kindo K, Nojiri H, Engelhardt L, Luban M, Brechin EK, Gass IA
Journal TitlePhysical Review B
Volume80
Pages092401
Date Published09/01
ISBN Number1098-0121
Accession NumberISI:000270383000006
Keywordsenergy level crossing, ferromagnetic materials, ground states, heisenberg model, iron compounds, magnetic susceptibility, nanostructured materials, organic compounds
Abstract

The differential susceptibility, dM/dH, of an {Fe-8}-cubane cluster has been measured for magnetic fields up to 54 T at 1.3 and 4.2 K using a pulsed-field technique. The data feature a single strong peak at 42 +/- 1 T, corresponding to a ground state level crossing at that field, in excellent agreement with the predicted value, 41 +/- 1 T, obtained using a Heisenberg model of the cluster. The theoretical model also accurately accounts for detailed features of the temperature and field dependence of the width and height of the observed peak.
URL<Go to ISI>://000270383000006
DOI10.1103/Physrevb.80.092401