Instability of the Crystal and Electronic Structures due to Hydrogenation Influenced the Magnetic Properties of a La_2/3Ca_1/3MnO₃ Manganite

Influence of heat sintering on the physical properties of bulk La0.67Ca0.33MnO3 perovskite manganite: role of oxygen in tuning the magnetocaloric response

“…For the higher-temperature-sintered samples, significant negative slopes are observed in the M 2 ( H / M ) curves, which are consistent with previous observations for bulk La 0.67 Ca 0.33 MnO 3 . 34 Bui et al 72 investigated the coexistence of several isostructural oxygen-deficient phases and its impact on the nature of the magnetic transition of the La 0.67 Ca 0.33 MnO 3 compound. They found that oxygen-deficiency led to magnetic inhomogeneity, resulting in the appearance of a Griffiths phase and causing a first- to second-order phase transformation.…”