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Issue 5, 2014
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Finite size effects in molecular spin crossover materials

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In recent years, study of nano-objects with first-order phase transitions has raised new interesting questions. Indeed, the phase stability and the transformation kinetics are highly dependent on the object size. In the case of the spin crossover phenomenon size effects may lead to a loss of the hysteresis (bistability) properties, a shift of the transition temperature or the occurrence of an incomplete transition and also reappearance of the hysteresis upon extreme size reduction (∼1–4 nm). Research in this area is growing, but the mechanisms of the spin transition at the nanoscale and in particular the size dependence of the collective behaviour are still not completely understood. The aim of this Focus paper is to point out new issues brought about by the size-reduction effects. We also review size-induced effects for a few selected phase transition phenomena, such as structural or electronic transitions, with the aim of highlighting the possible analogies with the spin crossover phenomenon.

Graphical abstract: Finite size effects in molecular spin crossover materials

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The article was received on 14 Oct 2013, accepted on 03 Dec 2013 and first published on 19 Dec 2013

Article type: Focus
DOI: 10.1039/C3NJ01268A
Citation: New J. Chem., 2014,38, 1834-1839
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    Finite size effects in molecular spin crossover materials

    M. Mikolasek, G. Félix, W. Nicolazzi, G. Molnár, L. Salmon and A. Bousseksou, New J. Chem., 2014, 38, 1834
    DOI: 10.1039/C3NJ01268A

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