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Phase Relations in the Ni–Mn–Ga Ternary System and Aging Effect on Shape Memory Properties of Ferromagnetic Ni2MnGa Sputtered Films

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Summary.

Isothermal sections of the Ni–Mn–Ga ternary phase diagram at 1073 and 1273 K were investigated over a wide range of alloy compositions. The range of the β-Ni2MnGa phase, its equilibria with the γ-(Mn, Ni), α′-Ni3Ga, and γ-Ni3Ga2 phases, and the liquidus and solidus lines were determined experimentally. The aging effect on the shape memory effect (SME) of Ni2MnGa sputtered films was also investigated. The two-way SME of the constraint-aged films was confirmed by the temperature change.

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Authors and Affiliations

  1. Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 980-8577, Sendai, Japan

    Makoto Ohtsuka & Kimio Itagaki

  2. Formerly, Graduate Student, Graduate School of Engineering, Tohoku University, 980-8577, Sendai, Japan

    Christina Wedel

Authors
  1. Makoto Ohtsuka
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  2. Christina Wedel
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  3. Kimio Itagaki
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Corresponding author

Correspondence to Makoto Ohtsuka.

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Ohtsuka, M., Wedel, C. & Itagaki, K. Phase Relations in the Ni–Mn–Ga Ternary System and Aging Effect on Shape Memory Properties of Ferromagnetic Ni2MnGa Sputtered Films. Monatsh. Chem. 136, 1909–1914 (2005). https://doi.org/10.1007/s00706-005-0382-z

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  • DOI: https://doi.org/10.1007/s00706-005-0382-z

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