Structure and Temperature Dependent Magnetic Properties of Mg Modified $ LaFeO_{3} $

Abstract This work presents the study of the effect of $ Mg^{2+} $ modification in lanthanum ferrite $ La_{(1-x)} %$ Mg_{x} %$ FeO_{3} $ (x = 0, 0.02, 0.04, 0.06, 0.08, and 0.1) synthesized using PVA-based sol–gel method on its structural and magnetic properties. Various structural parameters were d...
Ausführliche Beschreibung

Abstract This work presents the study of the effect of $ Mg^{2+} $ modification in lanthanum ferrite $ La_{(1-x)} %$ Mg_{x} %$ FeO_{3} $ (x = 0, 0.02, 0.04, 0.06, 0.08, and 0.1) synthesized using PVA-based sol–gel method on its structural and magnetic properties. Various structural parameters were determined using Rietveld refinement of XRD data. Change in the unit cell parameters was observed with an increase in $ Mg^{2+} $ doping. The morphology and particle size of $ La_{(1-x)} %$ Mg_{x} %$ FeO_{3} $ nanoparticles were obtained using FESEM and TEM micrographs. Zero field cooled exchange bias was observed in M-H hysteresis $ curves_{.} $ The enhancement in magnetization is due to combined effect of particle size and distortion in doped samples which causes change in the spin structure. The variation of exchange bias with temperature under field cooled conditions is studied and found that the exchange bias increases with decrease in temperature due to thermal activation of antiferromagnetic core. Ausführliche Beschreibung