Please use this identifier to cite or link to this item: http://hdl.handle.net/2445/10525
Title: Magnetic field induced entropy change and magnetoelasticity in Ni-Mn-Ga alloys
Author: Marcos, Jordi
Planes Vila, Antoni
Mañosa, Lluís
Casanova i Fernàndez, Fèlix
Batlle Gelabert, Xavier
Labarta, Amílcar
Martínez Benjamin, Joan Josep
Keywords: Transformacions martensítiques
Magnetostricció
Entropia
Aliatges
Materials ferromagnètics
Martensitic transformations
Magnetostriction
Entropy
Alloys
Ferromagnetic materials
Issue Date: 2002
Publisher: The American Physical Society
Abstract: The magnetocaloric effect that originates from the martensitic transition in the ferromagnetic Ni-Mn-Ga shape-memory alloy is studied. We show that this effect is controlled by the magnetostructural coupling at both the martensitic variant and magnetic domain length scales. A large entropy change induced by moderate magnetic fields is obtained for alloys in which the magnetic moment of the two structural phases is not very different. We also show that this entropy change is not associated with the entropy difference between the martensitic and the parent phase arising from the change in the crystallographic structure which has been found to be independent of the magnetic field within this range of fields.
Note: Reproducció digital del document publicat en format paper, proporcionada per PROLA i http://dx.doi.org/10.1103/PhysRevB.66.224413
It is part of: Physical Review B, 2002, vol. 66, núm. 22, p. 224413(1)-224413(6)
URI: http://hdl.handle.net/2445/10525
ISSN: 0163-1829
Appears in Collections:Articles publicats en revistes (Física Quàntica i Astrofísica)
Articles publicats en revistes (Física de la Matèria Condensada)

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