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Issue 20, 2010
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Simple models and powerful tools for seeking a comprehensive understanding of the magnetic properties of molecular magnets

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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 {Fe8}-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 {Fe8}-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.

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

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Article information


Submitted
07 Jan 2010
Accepted
25 Feb 2010
First published
23 Mar 2010

Dalton Trans., 2010,39, 4687-4692
Article type
Perspective

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

L. Engelhardt and M. Luban, Dalton Trans., 2010, 39, 4687
DOI: 10.1039/C000356E

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