Eur. Phys. J. B 65, 207-212 (2008)
https://doi.org/10.1140/epjb/e2008-00346-y

Magnetocaloric effect in the pseudobinaries (Ho_1-cR_c)Co₂ (R = Er and Dy)

Universidade do Estado do Rio de Janeiro, Rua São Francisco Xavier, 524, Rio de Janeiro 2050-013, Brazil

Corresponding author: ^a nilson@uerj.br

Received: 20 June 2008
Published online: 12 September 2008

Abstract

In this work, it is theoretically discussed the magnetocaloric effect in the Laves phase doped compounds (Ho_1-cEr_c)Co₂ and (Ho_1-cDy_c)Co₂. 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 (Ho_1-cEr_c)Co₂ and (Ho_1-cDy_c)Co₂ exhibit large values of the magnetocaloric potentials in a wide range of temperatures.