Simultaneous Reflectivity and Magnetic Measurements on Photomagnetic Solids: Spin-Crossover Solids and a Prussian Blue Analogue

Abstract Thermo or photo-chromic properties can be measured using the light reflected by a surface. An apparatus has been designed for coupling to a SQUID Magnetometer. Instrumental improvements and new results on photo-magnetic systems are reported : (i) Spin crossover system [FexCo1−x(btr)2(NCS)2]·H2O : direct and reverse LIESST, Light Induced Thermal and Optical Hysteresis (LITH/LIOH) (ii) Prussian blue analogue Rb0.52Co[Fe(CN)6]0.84,2.31 H2O : first optical detection of photo-excitation and thermal relaxation of the metastable state.