Hydrostatic pressure investigation of the spin crossover compound [Fe(PM―BiA)₂(NCS)₂] polymorph I using reflectance detection

Aurelian Rotaru (1, 2) , Francois Varret (1) , Epiphane Codjovi (1) , Kamel Boukheddaden (1) , Jorge Linares (1) , Alexandru Stancu (2) , Philippe Guionneau (3) , Jean-François Letard (3)

1 GEMAC - Groupe d'Etude de la Matière Condensée
2 Department of Solid State and Theoretical Physics
3 ICMCB - Institut de Chimie de la Matière Condensée de Bordeaux

We investigated by diffuse reflectivity the effect of hydrostatic pressure (1–1800 bar) on the thermal spin transition of Fe(PM−BiA)2(NCS)2 polymorph I, where PM=N-2-pyridylmethylene and BiA=4-aminobiphenyl. We evidenced the onset of a progressive transformation into a phase of higher cooperativity which cannot be assigned to polymorph II. This result is discussed with respect to previous pressure investigations.

Domaines: Matériaux

Aurelian Rotaru, Francois Varret, Epiphane Codjovi, Kamel Boukheddaden, Jorge Linares, et al.. Hydrostatic pressure investigation of the spin crossover compound [Fe(PM―BiA)₂(NCS)₂] polymorph I using reflectance detection. Journal of Applied Physics, 2009, 106 (5), pp.053515. ⟨10.1063/1.3202385⟩. ⟨hal-00435071⟩