Origin of the magnetostrictive behaviour in a Ni-Mn-Ga-Co-In metamagnetic shape memory alloy single crystal
Ni-Mn-based magnetic shape memory alloys, MSMAs, are active materials that undergo martensitic transformations induced by temperature, stress and/or magnetic fields. This lead to large recoverable mechanical transformations, due to either a reorientation of martensitic twin-variants or a magnetic-field induced martensitic transformation. Ni-Mn-Ga-Co-In alloys present a metamagnetic behaviour in their martensite phase, where stoichiometry controls the critical transformation temperatures: structural, TM, and magnetic, TC. It was shown that with an exact composition of Ni43Mn31Co9Ga14In3, the single crystal shows magnetic field dependant twin-variants making that composition extremely interesting for applications. Being these applications dependant on the atomic site occupancies and magnetic structure, and those influenced by the form of the material (polycrystal, single crystal, thin films), we propose to carry out a single crystal diffraction study with the goal of elucidating the role of the atomic site occupancies in a Ni43Mn31Co9Ga14In3 single crystal.
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RIO LOPEZ Natalia Ahiova; CHERNENKO Volodymyr; FEUCHTWANGER Jorge; LAZPITA Patricia; PETRENKO Viktor; PORRO AZPIAZU Jose Maria and RODRIGUEZ VELAMAZAN Jose Alberto. (2023). Origin of the magnetostrictive behaviour in a Ni-Mn-Ga-Co-In metamagnetic shape memory alloy single crystal. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.5-12-363
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