Light induced ferromagnetism of nanocrystalline CuCr2Se4 particles

A novel method to synthesize ternary chalcogenide nanoparticles was developed with microwaveassisted polyol reaction in this study. Copper chloride, chromium acetate and metallic selenium were used as precursors with stoichiometric ratios in poly ethylene glycol. Magnetic moment of CuCr2Se4 nanoparticles was measured from 300 to 750 K with external magnetic field of 500 Oe in argon atmosphere and Curie temperature was calculated as 445 K. Nanocrystalline CuCr2Se4 particles were dispersed in the matrix of light transparent resin so as to investigate light induced effect on the magnetic properties. Light illumination in an external magnetic field increased the magnetization and increment of magnetization (δJ) to initial magnetization (J) showed a maximum at 250 Gauss.