Giant magnetic-field-induced strain in Ni-Mn-Ga micropillars. (June 2018)

• Record Type: Journal Article
• Authors: Musiienko, Denys; Straka, Ladislav; Klimša, Ladislav; Saren, Andrey; Sozinov, Alexei; Heczko, Oleg; Ullakko, Kari
• Is Part Of: Scripta materialia. Number 150(2018)
• Page Start: 173
• Page End: 176
• Publication Date: 2018-06
• Subjects: Ferromagnetic shape memory -- Twinning -- MEMS -- Focused ion beam -- Micro-magneto-mechanical systems; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2018.03.020
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: We report on the observation of fully reversible magnetic-field-induced strain of 6 % in a single-crystalline micropillar fabricated from a bulk Ni50 Mn28.5 Ga21.5 single crystal. Xe plasma source focused ion beam column milling technology was used to machine 50 × 50 × 100 μm 3 cuboid pillars. The removal of about 2 μm of ion-beam-damaged surface layer enabled magnetic field actuation in pillars. Our results demonstrate the feasibility of manufacturing of micrometre-sized magnetic shape memory actuators by focused ion beam technique. Graphical abstract: