Influence of the crystalline electrical field on the magnetocaloric effect in the series RNi2 (R=Pr, Nd, Gd, Tb, Ho, Er)
Abstract
The magnetocaloric properties in the series RNi2 (R=Pr, Nd, Gd, Tb, Ho, Er) were fully investigated using a model Hamiltonian that includes the exchange magnetic interaction and the crystalline electrical-field anisotropy. All theoretical results was obtained using the proper model parameters found in the literature for the compounds belonging to this series. For ErNi2 we obtained a good agreement between theoretical and experimental data in the magnetocaloric potentials. An anomalous second peak was predicted to exist in the magnetocaloric curves for HoNi2 and it was ascribed to the high density of states at low temperature.
- Publication:
-
Physical Review B
- Pub Date:
- May 2001
- DOI:
- 10.1103/PhysRevB.63.184406
- Bibcode:
- 2001PhRvB..63r4406V
- Keywords:
-
- 75.30.Sg;
- 75.10.Dg;
- 75.20.En;
- Magnetocaloric effect magnetic cooling;
- Crystal-field theory and spin Hamiltonians;
- Metals and alloys