XXI All-Russian School-Seminar on Problems of Condensed Matter Physics (SPCMP-21), Ekaterinburg, March 18-25, 2021. In situ TEM study of phase transformations in nonstoichiometric Ni46Mn41In13 Heusler alloy
Kuznetsov D. D.
1, Kuznetsova E. I.
2, Mashirov A. V.
1, Loshachenko A. S.3, Danilov D. V.3, Shandryuk G. A.
4, Shavrov V. G.
1, Koledov V. V.
1
1Kotelnikov Institute of Radio Engineering and Electronics, Russian Academy of Sciences, Moscow, Russia
2M.N. Mikheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences, Yekaterinburg, Russia
3IRC Nanotechnology, Research Park, St. Petersburg State University, St. Petersburg, Russia
4Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences, Moscow, Russia
Email: kuznetsov.dmitry89@gmail.com, monocrist@imp.uran.ru, a.v.mashirov@mail.ru, a.loshachenko@spbu.ru, danilov1denis@gmail.com, gosha@ips.ac.ru, shavrov@cplire.ru, victor_koledov@mail.ru
This paper presents a study of the metamagnetostructural transition of the martensitic type in the Ni46Mn41In13 alloy with magnetic shape memory and inverse magnetocaloric effect. The characteristic temperatures of the direct transition starting M_s=253 K and its finishing M_f=164 K, as well as the reverse temperatures A_s=203 K and A_f=236 K, respectively, were determined by differential scanning calorimetry. The characteristic peculiarities of the transition: a decrease of the Ms and the presence of a residual austenite phase, as well as pre-martensitic states, were studied using transmission electron microscopy. The estimated the thickness of alloy was 50 nm, when martensitic transition suppressed. Keywords: martensitic transformation, metamagnetostructural transformation, premartensitic states.
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