Effect of doping with Iron on the charge ordering in La ₀₃₃ Ca ₀₆₇ Mn₁ - y Fe y O₃ ( y = 0, 0.05) manganites

Abstract

The formation and specific features of the superstructure in manganites doped with iron are investigated using transmission electron microscopy. The electron diffraction patterns of the manganites are studied in the temperature range 90-300 K, and the high-resolution electron microscope images recorded at temperatures of 91-92 K are analyzed. In both manganites, the structural transition that is accompanied by the formation of the superstructure and which is directly observed from the appearance of additional peaks in the electron diffraction patterns occurs at a temperature that is in close agreement with the charge ordering temperature T CO determined from the temperature dependences of the magnetization M ( T )