Magnetic Bistability in a Submonolayer of Sublimated Fe4 Single-Molecule Magnets
Nano Letters2014Vol. 15(1), pp. 535–541
Citations Over TimeTop 10% of 2014 papers
Luigi Malavolti, Valeria Lanzilotto, Silviya Ninova, Lorenzo Poggini, Irene Cimatti, Brunetto Cortigiani, L. Margheriti, Daniele Chiappe, Edwige Otero, Philippe Sainctavit, Federico Totti, Andrea Cornia, Matteo Mannini, Roberta Sessoli
Abstract
We demonstrate that Fe4 molecules can be deposited on gold by thermal sublimation in ultra-high vacuum with retention of single molecule magnet behavior. A magnetic hysteresis comparable to that found in bulk samples is indeed observed when a submonolayer film is studied by X-ray magnetic circular dichroism. Scanning tunneling microscopy evidences that Fe4 molecules are assembled in a two-dimensional lattice with short-range hexagonal order and coexist with a smaller contaminant. The presence of intact Fe4 molecules and the retention of their bistable magnetic behavior on the gold surface are supported by density functional theory calculations.
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