Electron spin resonance and magnetic phase transitions in manganite perovskite La₀.₇₈Sr₀.₂₂MnO₃ synthesized by the solid-phase reaction method

Abstract

Magnetic properties of nanopowder of perovskite manganite doped with strontium La₀.₇₈Sr₀.₂₂MnO₃ are studied using electron paramagnetic resonance method. Analysis of the experiments in the temperature range T = 77-290 K shows that this structure is a typical nanostructure only at T < 100 K. In the remaining temperature region, the structure is in the superparamagnetic and noncollinear superparamagnetic magnetic state.