Premartensitic phase transformation in the Ni2MnGa shape memory alloy

Authors
Manosa, L Gonzalez-Comas, A Obrado, E Planes, A
Citation
L. Manosa et al., Premartensitic phase transformation in the Ni2MnGa shape memory alloy, MAT SCI E A, 275, 1999, pp. 329-332
Citations number
11
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Material Science & Engineering
Journal title
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN journal
09215093 → ACNP
Volume
275
Year of publication
1999
Pages
329 - 332
Database
ISI
SICI code
0921-5093(199912)275:<329:PPTITN>2.0.ZU;2-W
Abstract
We present a phenomenological model for the premartensitic phase transition in ferromagnetic Ni-Mn-Ga alloys. The model contemplates the effects of an applied mechanical stress on the premartensitic transition. It is shown th at the premartensitic transition is driven by a magnetoelastic coupling. Th e first order character of this transition is enhanced by the application o f a mechanical stress. Experimental data are also presented which support t he predictions of the proposed model. (C) 1999 Elsevier Science S.A. All ri ghts reserved.