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Nano Lett. 2014 Jun 11;14(6):3364-8. doi: 10.1021/nl500872c. Epub 2014 May 2.

Spin-crossover and massive anisotropy switching of 5d transition metal atoms on graphene nanoflakes.

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1
Institute of Nanotechnology (INT), KIT , 76021, Karlsruhe, Germany.

Abstract

In spin crossover phenomena, the magnetic moment of a molecule is switched by external means. Here we theoretically predict that several 5d-transition metals (TMs) adsorbed on finite graphene flakes undergo a spin crossover, resulting from multiple adsorption minima, that are absent in the zero-dimensional limit of benzene and the two-dimensional limit of graphene. The different spin states are stable at finite temperature and can be reversibly switched with an electric field. The system undergoes a change in magnetic anisotropy upon spin crossover, which facilitates read-out of the spin state. The TM-decorated nanoflakes thus act as fully controlled single-ion magnetic switches.

PMID:
24762041
DOI:
10.1021/nl500872c
[Indexed for MEDLINE]
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