Quantum tunnelling of the magnetization in a monolayer of oriented single-molecule magnets

M. Mannini, F. Pineider, C. Danieli, F. Totti, L. Sorace, Ph. Sainctavit, M.-A. Arrio, E. Otero, L. Joly, J. C. Cezar, A. Cornia and R. Sessoli ()
Additional contact information
M. Mannini: University of Florence, 50019 Sesto Fiorentino, Italy
F. Pineider: University of Florence, 50019 Sesto Fiorentino, Italy
C. Danieli: University of Modena and Reggio Emilia, 41100 Modena, Italy
F. Totti: University of Florence, 50019 Sesto Fiorentino, Italy
L. Sorace: University of Florence, 50019 Sesto Fiorentino, Italy
Ph. Sainctavit: Institut de Minéralogie et de Physique des Milieux Condensés, CNRS UMR7590, Université Pierre et Marie Curie, 75252 Paris, France
M.-A. Arrio: Institut de Minéralogie et de Physique des Milieux Condensés, CNRS UMR7590, Université Pierre et Marie Curie, 75252 Paris, France
E. Otero: Synchrotron Soleil, Saint Aubin, 91192 Gif sur Yvette, France
L. Joly: Swiss Light Source, Paul Scherrer Institut, 5232 Villigen, Switzerland
J. C. Cezar: European Synchrotron Radiation Facility, 38043 Grenoble, France
A. Cornia: University of Modena and Reggio Emilia, 41100 Modena, Italy
R. Sessoli: University of Florence, 50019 Sesto Fiorentino, Italy

Nature, 2010, vol. 468, issue 7322, 417-421

Abstract: Quantum spin in single molecule magnets Single-molecule magnets are molecular complexes with magnetic bistability that may be exploited in information storage applications. Recently it was shown that such a molecular magnetic memory effect is retained for Fe4 clusters when they are wired to a gold surface. Mannini et al. have now tailored the clusters so that they have a preferential orientation and form a self-assembled monolayer on the surface. As a result, it becomes possible to observe a striking effect of single-molecule magnets — quantum tunnelling of the magnetization, which shows up as steps in the magnetic hysteresis loop. This approach may be of use for the design of practical thin-film molecular spintronic devices.

Date: 2010
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DOI: 10.1038/nature09478

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