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American Physical Society, Physical Review Letters, 9(107), 2011

DOI: 10.1103/physrevlett.107.097203

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Magnetic Dipolar Ordering and Quantum Phase Transition in anFe8Molecular Magnet

Journal article published in 2011 by E. Burzurí ORCID, F. Luis, B. Barbara, R. Ballou, E. Ressouche, O. Montero, J. Campo ORCID, S. Maegawa
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This paper is available in a repository.

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Abstract

We show that a crystal of mesoscopic Fe(8) single-molecule magnets is an experimental realization of the quantum Ising model in a transverse field, with dipolar interactions. Quantum annealing has enabled us to explore the quantum and classical phase transitions between the paramagnetic and ferromagnetic phases, at thermodynamical equilibrium. The phase diagram and critical exponents that we obtain agree with expectations for the mean-field universality class.