Study of magnetically induced crystal reorientation of Ni-Mn-Ga ferromagnetic shape memory alloy

0537441 - FZÚ 2021 RIV SK eng C - Konferenční příspěvek (zahraniční konf.)
Sukup, Š. - Heczko, S. - Heczko, Oleg
Study of magnetically induced crystal reorientation of Ni-Mn-Ga ferromagnetic shape memory alloy.
20th Conference of Czech and Slovak Physicists Proceedings. Košice: Slovak Physical Society, Czech Physical Society, 2020 - (Džubinská, A.; Reiffers, M.), s. 67-68. ISBN 978-80-89855-13-1.
[Conference of Czech and Slovak Physicists /20./. Prague (CZ), 07.09.2020-10.09.2020]
Grant CEP: GA ČR GA19-09882S
Institucionální podpora: RVO:68378271
Klíčová slova: martensitic transformation * Ni-Mn-Ga * magnetic shape memory alloys * Heusler alloys
Obor OECD: Condensed matter physics (including formerly solid state physics, supercond.)

In the past two decades Ni-Mn-Ga Heusler alloys have received great attention as these exhibit magnetic shape memory effects in low symmetry phases, modulated 10M and 14M and non-modulated martensite [1]. Here we focus on modulated 10M martensite [2]. These phases are formed upon martensitic transformation from high temperature parent Heusler cubic phase with L21order. These materials belong to the multiferroic class of materials, in this case magnetoelastic multiferroics coupling ferromagnetism and ferroelasticity [3]. Owing to very highly mobile twin boundary separating differently oriented ferroelastic domains (twins), the martensitic twinned structure can be manipulatedby magnetic field and stress resulting in large mechanically induced changes of magnetization and giant magnetically induced strain in 10M martensite about 6% [4].
Trvalý link: http://hdl.handle.net/11104/0315179