The evolution of magnetic and electrical phases in La 0.8-δCa0.2MnO3 was investigated in terms of La deficiency. We found that the increase of the La deficiency tends to raise the Curie temperature (TC) in La0.8-δCa 0.2MnO3. The FM clusters formed in compounds with large La deficiency provide percolation paths above TC. With increasing the La defect, the transport property changes from insulating to metallic state, which is in association with the crossover from a second order to a first order magnetic phase transition in the vicinity of TC.
- A. Magnetically ordered materials
- A. Perovskite manganites
- D. Colossal magnetoresistance
ASJC Scopus subject areas
- Condensed Matter Physics
- Materials Chemistry