Direct evidence of random field effect on magnetic ordering of La_(0.5)Gd_(0.2)Sr_(0.3)MnO_(3) manganite system

TL;DR

This study provides direct experimental evidence that quenched random fields influence magnetic ordering in La_(0.5)Gd_(0.2)Sr_(0.3)MnO_(3) manganites, leading to cluster formation and glass-like freezing behavior.

Contribution

It offers new experimental proof of how quenched random fields affect magnetic cluster formation and freezing in manganites, highlighting the role of applied magnetic fields.

Findings

Random fields induce finite size magnetic clusters.

Cluster size correlates with random field strength.

Magnetic measurements show cluster-glass freezing behavior.

Abstract

We report direct experimental evidence of the effect of quenched random field on magnetic ordering of La_(0.5)Gd_(0.2)Sr_(0.3)MnO_(3) manganites system. We demonstrate magnetic measurements providing serious evidence to support that quenched random field of Gd divides the system in finite size clusters which undergo cluster-glass like freezing. The size or concentration of these clusters is found to be closely related to the effect of random field, which in turn is a function of applied field.