Mössbauer and magnetic studies of La0.8Sr0.2CoO3-δ CMR perovskite

In this paper we present 57Co emission Mossbauer and AC magnetic susceptibility studies of La0.8Sr0.2CoO3-δ perovskite. The observed coexistence of paramagnetic and magnetic subspectra in the 57Co emission Mossbauer spectra, as well as the difference of their isomer shifts support the existence of electronic phase separation in this perovskite, in good agreement with the double exchange based cluster model.