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NiMnGa Ferromagnetic Shape Memory Films

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Czechoslovak Journal of Physics Aims and scope

Abstract

The structure and magnetic properties of polycrystalline NiMnGa films have been investigated. The films were obtained by a flash-evaporation method from powders of Ni49Mn30Ga21 and Ni53Mn25Ga22 alloys. The magnetic properties of the films are similar to bulk alloys with the Curie temperature T C ≈ 380 K and the martensitic transformation temperature T M ≈ 290 and 400 K for Ni49Mn30Ga21 and Ni53Mn25Ga22, respectively. Below T M, due to an increase of magnetic anisotropy in martensitic phase, ferromagnetic-resonance spectra at the perpendicular configuration exhibit an anomalous shift to lower fields and the linewidth substantially increases.

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Authors and Affiliations

  1. Institute of Molecular Physics, PASci, ul. M. Smoluchowskiego 17, 60-179 Poznań, Poland

    J. Dubowik

  2. A. Mickiewicz University, Department of Physics, Umultowska 85, 61-614 Poznań, Poland

    I. Gościańska

  3. Institute of Metal Physics, NANU, 36 Vernadsky Ave, 03142 Kiev, Ukraine

    Y. V. Kudryavtsev

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  1. J. Dubowik
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  2. I. Gościańska
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  3. Y. V. Kudryavtsev
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Dubowik, J., Gościańska, I. & Kudryavtsev, Y. NiMnGa Ferromagnetic Shape Memory Films. Czech J Phys 54 (Suppl 4), 213–216 (2004). https://doi.org/10.1007/s10582-004-0066-7

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  • DOI: https://doi.org/10.1007/s10582-004-0066-7

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