Influence Fe addition on structural and magnetic properties of Ni45Co5Mn25-xFexGa20Cu5 (x = 0, 1, 2, 4, 5, 6 and 8) Heusler alloys
Recently, Ni-Mn-Ga based high temperature magnetic shape memory alloys have become the focus of intense research due to the observation of magnetic-field-induced strain at high temperatures, giving rise to many potential applications as contactless actuators in areas such as aerospace or automotive industries. For these compounds the martensitic structure and magnetic order are key parameters for the output strain obtained, and shown to be extremely sensitive to the composition of the alloys. We propose to carry out a neutron diffraction study in order to clarify experimentally the influence of the Fe addition on the martensitic transformation and the magnetic interactions in a series of polycrystalline and single crystalline samples of composition Ni45Co5Mn25 xFexGa20Cu5 (x=0, 1, 2, 4, 5, 6 and 8). In these alloys the effect of the Fe doping, promotes a simultaneous increase of Curie temperature and spontaneous magnetization, but a decrease of the martensitic transformation temperatures. The obtained results could be correlated with changes in the martensitic transformation and magnetic moment, key parameters for the magnetic-field-induced-martensitic-transformation.
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LAZPITA Patricia; BARANDIARAN Jose Manuel; CHERNENKO Volodymyr; FEUCHTWANGER Jorge; J. Gutierrez; Thomas C. Hansen; MARTINEZ CASADO Francisco Javier; MONDELLI Claudia; A. Perez-Checa; SOZINOV Alexei and STUNAULT Anne. (2018). Influence Fe addition on structural and magnetic properties of Ni45Co5Mn25-xFexGa20Cu5 (x = 0, 1, 2, 4, 5, 6 and 8) Heusler alloys. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.1-04-126
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