Colossal magnetoresistance and quenched disorder in manganese oxides

TL;DR

This paper reviews recent experimental and theoretical research on colossal magnetoresistive manganites, emphasizing the role of quenched disorder in their transport and magnetic properties, and discusses progress in controlling disorder effects.

Contribution

It provides a comprehensive overview of how quenched disorder influences manganites, integrating experimental findings and theoretical models within the double-exchange framework.

Findings

Disorder significantly affects transport and magnetic properties.

Experimental control of disorder strength has advanced.

Disorder impacts phase competition and colossal magnetoresistance.

Abstract

We give an overview on several recent topics of colossal magnetoresistive manganites in both experiments and theories, focusing on the effect of quenched disorder. The disorder is intrinsically involved since the compounds are solid solutions, and its importance has been pointed out in several experiments of transport and magnetic properties. Recent progress in the experimental control of the strength of disorder is also reviewed. Theoretically, the effect of the disorder has been explored within the framework of the double-exchange mechanism. Several efforts to understand the phase diagram and the electronic properties are reviewed. We also briefly discuss a recent topic on the effect of disorder on competing phases and the origin of colossal magnetoresistance.