Physics – Condensed Matter – Materials Science
Scientific paper
2011-01-14
Materials Research Society Symposia Proceedings 1200E (2010) G08-03
Physics
Condensed Matter
Materials Science
Scientific paper
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.
Bourgault Daniel
Caillault Nathalie
Carbone Laurent
Chometon Paul
Einig Antinéa
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