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Ni-Mn-Ga films in the austenite and the martensite structures at room temperature: Uniaxial texturation and epitaxial growth

Published online by Cambridge University Press:  31 January 2011

Jérémy Tillier ,
Antinéa Einig ,
Daniel Bourgault ,
Philippe Odier ,
Luc Ortega ,
Sébastien Pairis ,
Laureline Porcar ,
Paul Chometon ,
Nathalie Caillault  and
Laurent Carbone
Jérémy Tillier
Affiliation:
[email protected], CNRS, Institut Néel/CRETA, Grenoble, France
Antinéa Einig
Affiliation:
[email protected], Schneider Electric, Grenoble, France
Daniel Bourgault
Affiliation:
[email protected], CNRS, Institut Néel/CRETA, Grenoble, France
Philippe Odier
Affiliation:
[email protected], CNRS, Institut Néel/CRETA, Grenoble, France
Luc Ortega
Affiliation:
[email protected], CNRS, Institut Néel, Grenoble, France
Sébastien Pairis
Affiliation:
[email protected], CNRS, Institut Néel, Grenoble, France
Laureline Porcar
Affiliation:
[email protected], CNRS, Institut Néel/CRETA, Grenoble, France
Paul Chometon
Affiliation:
[email protected], CNRS, CRETA, Grenoble, France
Nathalie Caillault
Affiliation:
[email protected], Schneider Electric, Grenoble, France
Laurent Carbone
Affiliation:
[email protected], Schneider Electric, Grenoble, France
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Abstract

Ni-Mn-Ga films in the austenite and the martensite structures at room temperature have been obtained using the DC magnetron sputtering technique. Two elaboration processes were studied. A first batch of samples was deposited using a resist sacrificial layer in order to release the film from the substrate before vacuum annealing. This process leads to polycrystalline films with a strong (022) fiber texture. The martensitic phase transformation of such polycrystalline freestanding films has been studied by optical and scanning electron microscopy. A second batch of samples was grown epitaxially on (100)MgO substrates using different deposition temperatures. The texture has been analyzed with four-circle X-ray diffraction. Epitaxial films crystallized both in the austenite and the martensite structures at room temperature have been studied.

Keywords

sputteringfilmtexture
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1200: Symposium G – Magnetic Shape Memory Alloys , 2009 , 1200-G08-03
Copyright
Copyright © Materials Research Society 2010

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