Martensitic transformation hysteresis in Ni(Co)-Mn-Sn/MgO metamagnetic shape memory thin films. (November 2018)

• Record Type: Journal Article
• Authors: Alexandrakis, V.; Aseguinolaza, I.R.; Decker, P.; Salomon, S.; Barandiarán, J.M.; Ludwig, A.; Chernenko, V.A.
• Is Part Of: Scripta materialia. Number 156(2018)
• Page Start: 101
• Page End: 104
• Publication Date: 2018-11
• Subjects: Ni(Co)-Mn-Sn/MgO (001) thin films -- Martensitic transformation -- Thermal hysteresis -- Critical behaviour -- Shape memory; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2018.07.015
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: Hysteresis of martensitic transformations (MTs) is a crucial factor which affects the efficiency and lifetime of actuators and magnetocaloric devices. In the present work we found a tenfold reduction of the thermal hysteresis of MT caused by increasing the MT temperature in a series of Ni(Co)-Mn-Sn thin films deposited onto MgO (001). We have observed that this evolution is accompanied by a drastic change of the temperature dependence of the lattice parameter in the temperature interval of MT. Such a behaviour can be interpreted using the concept of the critical state, where an anhysteretic behaviour is expected. Graphical abstract: Unlabelled Image