Magnetic dipolar ordering and quantum phase transition in an Fe8 molecular magnet

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 ferromag...

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Bibliographic Details
Published inPhysical review letters Vol. 107; no. 9; p. 097203
Main Authors Burzurí, E, Luis, F, Barbara, B, Ballou, R, Ressouche, E, Montero, O, Campo, J, Maegawa, S
Format Journal Article
LanguageEnglish
Published United States 23.08.2011
Subjects
Iron - chemistry
Magnetics
Neutron Diffraction
Quantum Theory
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Summary: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.
ISSN:1079-7114
DOI:10.1103/PhysRevLett.107.097203