Magnetocaloric effect in ferromagnetic and ferrimagnetic systems under first and second order phase transition

In this work we present a model to describe the magnetocaloric effect (MCE) in ferrimagnetic arrangements. Our model takes into account the magnetoelastic interactions in the two coupled magnetic sublattices, which can lead to the onset of the first order magnetic phase transition and the giant-MCE....

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Bibliographic Details
Published in:Journal of magnetism and magnetic materials 2010, Vol.322 (1), p.84-87
Main Authors: von Ranke, P.J., de Oliveira, N.A., Alho, B.P., de Sousa, V.S.R., Plaza, E.J.R., Carvalho, A. Magnus G.
Format: Article
Language:English
Subjects:
Accuracy
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
Ferrimagnetism
Ferromagnetism
Lanthanide
Magnetic materials
Magnetic properties and materials
Magnetically ordered materials: other intrinsic properties
Magnetism
Magnetocaloric effect
Magnetocaloric effect, magnetic cooling
Mathematical models
Phase transformations
Physics
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Summary:In this work we present a model to describe the magnetocaloric effect (MCE) in ferrimagnetic arrangements. Our model takes into account the magnetoelastic interactions in the two coupled magnetic sublattices, which can lead to the onset of the first order magnetic phase transition and the giant-MCE. Several profiles of the MCE, such as: the inverse- and giant-MCE were systematically studied. Application of the model to the ferromagnetic compounds GdAl 2, Gd 5(Ge 1.72Si 2.28), Gd 5(Ge 2Si 2), and to the ferrimagnetic compound Y 3Fe 5O 12 was performed, showing a good agreement with the experimental data.
ISSN:0304-8853
DOI:10.1016/j.jmmm.2009.08.033