A new method for analyzing second-order phase transitions applied to the ferromagnetic transition of a polaronic system

TL;DR

This paper introduces a novel analytical method combining heat capacity and thermal expansion data to study second-order phase transitions, successfully applied to a ferromagnetic polaronic system, revealing critical behavior and large heat capacity exponents.

Contribution

The paper presents a new method for analyzing second-order phase transitions using combined thermodynamic data, improving accuracy in predicting critical properties.

Findings

Confirmed second-order nature of the transition

Predicted pressure dependence of critical temperature

Identified large heat capacity exponent

Abstract

A new method for analyzing second-order phase transitions is presented and applied to the polaronic system La$_{0.7}$Ca$_{0.3}$MnO$_{3}$. It utilizes heat capacity and thermal expansion data simultaneously to correctly predict the critical temperature's pressure dependence. Analysis of the critical phenomena reveals second-order behavior and an unusually large heat capacity exponent.