We demonstrate that Fe-4 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 Fe-4 molecules are assembled in a two-dimensional lattice with short-range hexagonal order and coexist with a smaller contaminant. The presence of intact Fe-4 molecules and the retention of their bistable magnetic behavior on the gold surface are supported by density functional theory calculations.
Magnetic bistability in a submonolayer of sublimated Fe4 single-molecule magnets / Malavolti, Luigi; Lanzilotto, Valeria; Ninova, Silviya; Poggini, Lorenzo; Cimatti, Irene; Cortigiani, Brunetto; Margheriti, Ludovica; Chiappe, Daniele; Otero, Edwige; Sainctavit, Philippe; Totti, Federico; Cornia, Andrea; Mannini, Matteo; Sessoli, Roberta. - In: NANO LETTERS. - ISSN 1530-6984. - 15:1(2015), pp. 535-541. [10.1021/nl503925h]
Magnetic bistability in a submonolayer of sublimated Fe4 single-molecule magnets
Lanzilotto, Valeria;
2015-01-01
Abstract
We demonstrate that Fe-4 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 Fe-4 molecules are assembled in a two-dimensional lattice with short-range hexagonal order and coexist with a smaller contaminant. The presence of intact Fe-4 molecules and the retention of their bistable magnetic behavior on the gold surface are supported by density functional theory calculations.Pubblicazioni consigliate
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