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Title: Magnetoelasticity and magnetoresistance in Cu-Al-Mn shape-memory alloys
Author: Marcos, Jordi
Planes Vila, Antoni
Mañosa, Lluís
Labarta, Amílcar
Hattink, Bart Jan
Keywords: Magnetostricció
Transformacions martensítiques
Aliatges lleugers
Martensitic transformations
Light metal alloys
Issue Date: 2001
Publisher: IEEE
Abstract: We study the effect of a magnetic field on the martensitic transition of a Cu-Al-Mn shape-memory alloy. The martensitic transition has been studied through resistance measurements under applied magnetic fields ranging from 0 to 50 kOe. Negative magnetoresistance showing an almost linear dependence with the square of the magnetization has been observed. This magnetoresistive effect is associated with the existence of small ferromagnetic Mn-clusters. Its strength and thermal dependence is different in both phases. The martensitic transition temperature is slightly increased and its spread in temperature significantly reduced upon increasing the field. These results show the existence of magnetoelastic coupling, which favors the nucleation of those martensitic variants with the easy magnetization axis aligned with the field.
Note: Reproducció del document publicat a
It is part of: IEEE Transactions on Magnetics, 2001, vol. 37, núm. 4 (Part 1), p. 2712-2714.
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ISSN: 0018-9464
Appears in Collections:Articles publicats en revistes (Física Quàntica i Astrofísica)
Articles publicats en revistes (Física de la Matèria Condensada)

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