THERMOREFLECTANCE, PHOTOCONDUCTANCE AND RAMAN SCATTERING OF FERROMAGNETIC SPINELS MCr 2X4 (M=Cd, Hg ; X=S, Se) NEAR THE MAGNETIC PHASE TRANSITION Milko IlievJ. Phys. Colloques, 41 C5 (1980) C5-23-C5-30DOI: https://doi.org/10.1051/jphyscol:1980505