Heusler compounds are one of the most versatile families of materials, showing a wide range of technological applications. Here we present a pure in-silico approach to fully study the physical properties of this promising family of materials as potential competitive magnetocalorics. The temperature and field dependence of the magnetization of three ternary Heusler compounds (Co 2 CrGa, Co 2 FeGa and Co 2 MnGa), as well as of two quaternary Heusler types (Co 2 Cr x Y 1-x Ga, Y=Fe and Mn) was simulated using DFT ab-initio and Random Path Sam- [a] complex oxides, thin films and nanoparticles and on the application of nuclear solid state techniques. Recent topics are magnetothermal and magnetostructural effects and their application on refrigeration and heat pumps.João Amaral obtained his PhD in Physics at the University of Aveiro in December 2009 and has dedicated most of his scientific career to the study of magnetism and magnetic materials. His main focus of research during MSc. and PhD. was on magnetocaloric materials for magnetic refrigeration applications. Recent research interests include rare-earth free permanent magnets, by optimizing their composition and production through nanostructuring techniques, in a combined effort with the use of theoretical tools such as Density Functional Theory and Ising/Heisenberg models.