Thermal cycling effects on static and dynamic properties of a phase separated manganite

TL;DR

This study investigates how thermal cycling influences the static and dynamic properties of phase separated manganites, revealing temperature-dependent aging and rejuvenation effects that shed light on their out-of-equilibrium behavior.

Contribution

It demonstrates the use of thermal cycles to probe the dynamical behavior of phase separated manganites, highlighting the interplay between static and dynamic properties.

Findings

Aging and rejuvenation effects observed above 100 K

Irreversible aging phenomena below 100 K

Thermal cycling reveals the dynamical behavior of phase separation

Abstract

In this work we address the interplay between two phenomena which are signatures of the out-of-equilibrium state in phase separated manganites: irreversibility against thermal cycling and aging/rejuvenation process. The sample investigated is La0.5Ca0.5MnO3, a prototypical manganite exhibiting phase separation. Two regimes for isothermal relaxation were observed according to the temperature range: for T > 100 K, aging/rejuvenation effects are observed, while for T < 100 K an irreversible aging was found. Our results show that thermal cycles act as a tool to unveil the dynamical behavior of the phase separated state in manganites, revealing the close interplay between static and dynamic properties of phase separated manganites.