Intrinsic inhomogeneities and effects of resistive switching in doped manganites

TL;DR

This study investigates how intrinsic inhomogeneities influence resistive switching in doped manganites, revealing that local superheating and phase separation significantly affect their magnetic and transport properties.

Contribution

It demonstrates the role of micrometer-scale inhomogeneities in phase separation and resistive switching in doped manganites, supported by experimental visualization and numerical calculations.

Findings

Magnetic structure visualization shows local superheating effects.

Inhomogeneity impacts phase separation and transport properties.

Numerical calculations support superheating hypothesis.

Abstract

The effect of resistive switching in doped manganites being in the ferromagnetic state has been studied using resistive and magneto-optic methods. The visualization of magnetic structure of La0.75Sr0.25MnO3-x single crystals, and its transformation under electric current proposed local superheating of the material above the Curie temperature, which was supported by numerical calculation. The obtained results suggest a significant role of micrometer-scale inhomogeneity of manganites in phase separation, magnetic and transport properties of the material.