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Title

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

AuthorsHerrero-Albillos, Julia; Bartolomé, Fernando; García, L. M.; Casanova, Fernando; Labarta, Amílcar; Batlle, Xavier
KeywordsMagnetocaloric effect
Internetalics
Metamagnetism
Issue DateJun-2006
PublisherElsevier
CitationJournal of Magnetism and Magnetic Materials 301(2): 378-382 (2006)
AbstractDifferential 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.
Description5 pages, 3 figures, 1 table.
Publisher version (URL)http://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
Appears in Collections:(ICMA) Artículos
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