The dependence of the magnetic properties on oxygen concentration in epitaxial La2CoMnO6 thin films deposited on (100)-oriented SrTiO3 substrates has been investigated by varying the oxygen background pressure during growth using pulsed laser deposition. Two distinct ferromagnetic (FM) phases are revealed, and the relative fraction varies with the oxygen concentration. The existence of oxygen vacancies induces the local vibronic Mn3+–O–Co3+ superexchange interactions in direct competition with the static FM Mn4+–O–Co2+ interactions. This results in the appearance of a new low temperature FM phase and suppression of the high-temperature FM phase, creating two distinct magnetic phase transitions.
No takes yet. Share an insight, caveat, or question.
Guo et al. (2007) studied this question.
Synapse has enriched 5 related papers. Consider them for comparative context: