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Temperature Dependent Elasticity of a Ni2MnGa Film as Measured by Impulsive Stimulated Scattering

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, , Citation J Sermeus et al 2014 J. Phys.: Conf. Ser. 520 012013 DOI 10.1088/1742-6596/520/1/012013

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1 Laboratory for Acoustics and Thermal physics, Department of Physics and Astronomy, KU Leuven, Celestijnenlaan 200D, 3001 Heverlee, Belgium

2 Institute of Thermomechanics, Academy of Sciences of the Czech Republic, Dolejskova 5, 182 00 Prague 8, Czech Republic

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1742-6596/520/1/012013

Abstract

We report the results of an impulsive stimulated scattering measurement conducted on a 550 nm film of Ni2MnGa on a MgO substrate, aiming at the direct experimental observation of the highly temperature dependent elasticity. The phase velocity of the surface acoustic waves excited on the surface of the coating-substrate shows an anomaly around the phase transition temperature of Ni2MnGa, showing that it is possible to use impulsive stimulated scattering as a characterization tool to determine temperature dependent elasticity of a thin film.

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10.1088/1742-6596/520/1/012013