Magnetocaloric Quantities ΔSiso and ΔTad in Materials With Canted Magnetic Moments: A Systematic Study

In this article, we theoretically discuss the magnetocaloric effect in materials with two non-equivalent sites and canted magnetic moments. For this purpose, we use a model Hamiltonian of local interacting magnetic moments with two sublattices, including uniaxial anisotropy, anisotropy on the exchange interaction, and the Dzyaloshinskii-Moriya interaction (DMI). In order to get an insight into the magnetocaloric properties of such a physical system, we perform a systematic analysis in terms of the model parameters for the particular case where the total angular momentum is
$J=7/2$
. Our theoretical calculations show that the curves of the magnetocaloric quantities
$\Delta S_{\mathrm { iso}}$
and
$\Delta T_{\mathrm { ad}}$
exhibit different behaviors, depending on the orientation of the magnetic moments and their response to the applied magnetic field.