  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.
