High-field specific heat and entropy obtained from adiabatic temperature change

TL;DR

This paper introduces a method to determine high-field specific heat and entropy of materials using ambient condition measurements and adiabatic field-induced temperature changes, validated against experimental data.

Contribution

The authors develop a thermodynamic approach to derive high-field specific heat and entropy from ambient measurements and adiabatic temperature changes, simplifying complex high-field experiments.

Findings

Method accurately reproduces experimental specific heat data under magnetic, electric, and pressure fields.

Thermodynamic equations provide straightforward calculations for high-field properties.

Results show good agreement with existing experimental measurements.

Abstract

Specific heat and entropy are relevant thermodynamic properties, which may be used as macroscopic probes to microscopic properties of materials under ambient conditions and under high applied fields. However, the measurement of specific heat under intense external fields can be a challenging task, as well as to obtain the entropy in the same conditions. Here, we describe a method to obtain high-field specific heat and entropy from measurements of specific heat under ambient conditions and direct temperature change induced by adiabatic field changes. We derive straightforward thermodynamic equations to calculate the specific heat and entropy and our results agree satisfactorily with experimental data of specific heat under magnetic field, electric field, and pressure.