Magnetocaloric effect in the pseudobinaries (Ho1-cRc)Co2 (R = Er and Dy)

In this work, it is theoretically discussed the magnetocaloric effect in the Laves phase doped compounds (Ho1-c Er (c) )Co-2 and (Ho1-c Dy (c) )Co-2. To this end, it has been used a model Hamiltonian of localized states and itinerant 3d-electrons, including the crystalline electrical field and the magnetoelastic interaction. The theoretical calculations show that composite materials made up of several samples of the doped compounds (Ho1-c Er (c) )Co-2 and (Ho1-c Dy (c) )Co-2 exhibit large values of the magnetocaloric potentials in a wide range of temperatures.