Mosaicity and structural fatigability of a gradual spin-crossover single crystal

Philippe Guionneau (1) , Sabine Lakhloufi (1, 2) , Marie-Hélène Lemée-Cailleau (2) , Guillaume Chastanet (1) , Patrick Rosa (1) , Cindy Mauriac (1) , Jean-Francois Létard (1)

1 ICMCB - Institut de Chimie de la Matière Condensée de Bordeaux
2 ILL - Institut Laue-Langevin

The present Letter introduces a novel approach to test the efficiency of spin crossover materials with regard to structural fatigability. By measuring single-crystal mosaicity, structural fatigability is evidenced in a gradual SCO iron compound. The non fatigability of the analogue non-SCO zinc compound demonstrates the role of SCO in such observation. The mosaicity strongly increases during the first cycles. It is therefore clearly shown that fatigability can affect non-cooperative SCO systems. Magnetic properties appear however not altered by the observed structural fatigability which is thus related to mechanical aspects of SCO.

Mots clés: Single crystal; Spin crossover; Physical properties

Domaines: Matériaux

Philippe Guionneau, Sabine Lakhloufi, Marie-Hélène Lemée-Cailleau, Guillaume Chastanet, Patrick Rosa, et al.. Mosaicity and structural fatigability of a gradual spin-crossover single crystal. Chemical Physics Letters, 2012, 542, pp.52-55. ⟨10.1016/j.cplett.2012.06.005⟩. ⟨hal-00718674⟩