SYNTHESES AND MAGNETIC PROPERTIES OF La1-xSrxMnOy (0.5 less than or equal to x less than or equal to 1.0) PEROVSKITE

摘要

La1-xSrxMnOy with 0.0 less than or equal to x less than or equal to 0.6 can easily be synthesized by conventional solid state reaction. In the case of the composition of x>0.6, they cannot be synthesized by the normal synthesis but by the two-stage solid state reaction, which at first makes the O-deficient state at high temperature and then inserts oxygen by O2 annealing at low temperature. Nevertheless all of obtained compound is single phase cubic perovskite structure, ferromagnetism and metallic property observed in the composition range 0.175 less than or equal to x less than or equal to 0.6 are not revealed, cause of drastic change between 0.50