Simple models and powerful tools for seeking a comprehensive understanding of the magnetic properties of molecular magnets

TitleSimple models and powerful tools for seeking a comprehensive understanding of the magnetic properties of molecular magnets
Publication TypeJournal Article
Year of Publication2010
AuthorsEngelhardt L, Luban M
Journal TitleDalton Transactions
Volume39
Pages4687-4692
ISBN Number1477-9226
Accession NumberISI:000277689800004
Keywordsclusters, energy-levels, neutron-scattering spectra
Abstract

The Heisenberg model provides a simple but powerful theoretical platform for modelling magnetic molecules. In this article, we demonstrate that-despite its simplicity-an isotropic Heisenberg model successfully provides a comprehensive description of the magnetic properties of the {Fe-8}-cubane and the {Cr12Cu2} magnetic molecules. However, in order to achieve this success, it is necessary to employ a variety of sophisticated experimental and theoretical techniques. These include the use of pulsed-field measurements to observe a high-field (41 T) ground-state level crossing in the {Fe-8}-cubane system, and tunnel-diode oscillator measurements, which we use to observe excited-state level crossings in the {Cr12Cu2} ring. For these two systems, the theoretical modelling was carried out using matrix diagonalization and quantum Monte Carlo calculations, respectively.

URL<Go to ISI>://000277689800004