Article ID Journal Published Year Pages File Type
1802741 Journal of Magnetism and Magnetic Materials 2009 4 Pages PDF
Abstract
The magnetocaloric effect (MCE) in the DyNi2, DyAl2 and Tb1−nGdnAl2 (n=0, 0.4, 0.6) was theoretically investigated in this work. The DyNi2 and DyAl2 compounds are described considering a model Hamiltonian which includes the crystalline electrical field anisotropy. The anisotropic MCE was calculated changing the magnetic field direction from 〈1 1 1〉 to 〈0 0 1〉 in DyNi2 and from 〈1 0 0〉 to 〈0 1 1〉 in DyAl2. The influence of the second- and first-order spin-reorientation phase transitions on the MCE that occurs in these systems is discussed. For the calculations of the MCE thermodynamic quantities in the Tb1−nGdnAl2 systems we take into account a two sites magnetic model, and good agreement with the available experimental data was obtained.
Related Topics
Physical Sciences and Engineering Physics and Astronomy Condensed Matter Physics
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