Impact of single crystal properties on nucleation and growth mechanisms of a spin transition

作者：Bedoui Salma^*; Nicolazzi William; Zheng Sipeng; Bonnet Sylvestre; Molnar Gabor; Bousseksou Azzedine

来源：Polyhedron, 2015, 87: 411-416.

DOI：10.1016/j.poly.2014.12.010

• Optical microscopy
• Single crystals
• Micro-structural defects
• Spin transition
• Nucleation and growth

We have investigated the spatio-temporal development of the spin transition in different single crystals of the molecular complex [Fe(bapby)(NCS)(2)] using optical microscopy. The thermal spin transition proceeds by nucleation at macroscopic defects, followed in most cases by anisotropic growth. We show that a lower crystalline quality leads to multi-site nucleation and intermittent spin transitions. We conclude that each crystal of a same spin crossover complex can have its proper spin transition kinetics depending on its crystalline properties and intrinsic microstructure.

• 出版日期2015-2