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- W2003153936 abstract "We have measured the attenuation of surface acoustic waves travelling through lithographied hybrid structures composed of MnAs thin films epitaxied on piezoelectric GaAs. Around room temperature, MnAs presents a well-known magnetostructural phase transition accompanied by a giant magnetocaloric effect. A large temperature dependent thermoelastic attenuation is found despite the film is much thinner (100 nm) than the wave penetration depth (∼10 μm). This phenomenon is attributed to strain-induced triggering of the MnAs magneto-caloric effect. We find that the frequency (ν) dependence of attenuation is quite unusual, ∼ν1.7, and that the attenuation weakly depends on the film thickness. We show that this behavior is due to the peculiar thermal boundary conditions imposed by magneto-caloric MnAs to the overall device." @default.
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- W2003153936 date "2014-10-20" @default.
- W2003153936 modified "2023-10-06" @default.
- W2003153936 title "Surface acoustic wave triggering of giant magnetocaloric effect in MnAs/GaAs devices" @default.
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- W2003153936 doi "https://doi.org/10.1063/1.4898387" @default.
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