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Título

Entropy change at the magneto structural transition in RCo2 (R = Dy, Ho, Er)

AutorHerrero-Albillos, Julia; Bartolomé, Fernando; García, L. M.; Casanova, Fernando; Labarta, Amílcar; Batlle, Xavier
Palabras claveMagnetocaloric effect
Internetalics
Metamagnetism
Fecha de publicaciónjun-2006
EditorElsevier
CitaciónJournal of Magnetism and Magnetic Materials 301(2): 378-382 (2006)
ResumenDifferential scanning calorimetry under applied magnetic field has been used to characterize the magnetocaloric effect in ErCo2, HoCo2, and DyCo2. The entropy change ΔS at the first-order magnetostructural transition present in these materials has been studied by inducing the transition; sweeping the temperature at a constant field and sweeping the field at a constant temperature. The corresponding values of ΔS differ significantly due to the broadness of the transition, i.e. the initial and final states involved when the transition is field or temperature induced are different. In the field-induced case, the additional work done by the magnetic field extending through the region in which the transition spread accounts roughly for the observed difference.
Descripción5 pages, 3 figures, 1 table.
Versión del editorhttp://dx.doi.org/10.1016/j.jmmm.2005.07.032
URIhttp://hdl.handle.net/10261/19645
DOI10.1016/j.jmmm.2005.07.032
ISSN1569-190X
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