Magnetocaloric effect in the pseudobinaries (Ho1-cRc)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 email@example.com
Published online: 12 September 2008
In this work, it is theoretically discussed the magnetocaloric effect in the Laves phase doped compounds (Ho1-cErc)Co2 and (Ho1-cDyc)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 (Ho1-cErc)Co2 and (Ho1-cDyc)Co2 exhibit large values of the magnetocaloric potentials in a wide range of temperatures.
PACS: 75.30.Sg – Magnetocaloric effect, magnetic cooling / 75.10.Dg – Crystal-field theory and spin Hamiltonians / 75.10.Lp – Band and itinerant models / 75.20.En – Metals and alloys
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2008