Evolution of in Fe-doped manganites synthesized by the ball-milling method

Manganites-based perovskites, having the general formula LnAMnMO where Ln is a rare earth element (Ln = Pr , La ,..) and A is an alkaline earth element (A = Sr , Ba , Ca ,..), were the center of interest of many studies because of their outstanding physicochemical properties and because they can play an important role in various applications. The aim of this work is the development with mechanical alloying method and study of physicochemical properties of new manganites. This work focuses on the development and characterization of series LaCaSrMnFeO (0 ≤ x≤ 0. 3. The structural study showed that the cell parameters of the samples increase with the increase in the rate of iron and causing the expansion of the orthorhombic distortion. This result is confirmed by the tolerance factor tg (0. 75 < tg< 0. 95 : orthorhombic structure). The magnetic study showed that the substitution of Mn by Fe in these series indicates a ferromagnetic-paramagnetic transition. This transition accompanied with a decrease in the Curie temperature (T)