Ultrafast actuation of Ni-Mn-Ga micropillars by pulsed magnetic field

0505257 - FZÚ 2020 RIV US eng J - Journal Article
Musiienko, D. - Saren, A. - Straka, Ladislav - Vronka, Marek - Kopeček, Jaromír - Heczko, Oleg - Sozinov, A. - Ullakko, K.
Ultrafast actuation of Ni-Mn-Ga micropillars by pulsed magnetic field.
Scripta Materialia. Roč. 162, Mar (2019), s. 482-485. ISSN 1359-6462. E-ISSN 1872-8456
R&D Projects: GA MŠMT LM2015087; GA MŠMT(CZ) LO1409; GA MŠMT(CZ) LM2015088; GA ČR GA16-00043S
EU Projects: European Commission(XE) 701867 - FUNMAH
Grant - others:FUNBIO(XE) CZ.2.16/3.1.00/21568
Institutional support: RVO:68378271
Keywords : ferromagnetic shape memory * twinning * nanoindentation * focused ion beam * Ni-Mn-Ga micropillars
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 5.079, year: 2019
Method of publishing: Limited access
https://doi.org/10.1016/j.scriptamat.2018.12.009

We report on the pulsed magnetic field actuation of single crystalline Ni-Mn-Ga cuboid micropillars with dimensions of 40 × 45 × 120 μm3, created by focused ion beam milling followed by electrochemical etching. Based on the experimental and modelled results, we differentiate between type I and type II twin boundary motion in the micropillar, which display about an order difference in actuation velocities. Magnetically-induced reorientation of a micropillar was obtained in less than 5 μs by type II twin boundary motion. Our results suggest the possibility of fabrication of magnetic shape memory microdevices with working frequencies up to 100 kHz.
Permanent Link: http://hdl.handle.net/11104/0296739