Magnetostructural Phase Transition in Micro- and Nanosize Ni-Mn-Ga-Cu Alloys
- Mashirov, Alexey, V
- Irzhak, Artemy, V
- Tabachkova, Nataliya Yu
- Milovich, Filipp O.
- Kamantsev, Alexander P.
- Zhao, Dewei
- Liu, Jian
- Kolesnikova, Valeria G.
- Rodionova, Valeria V.
- Koledov, Victor V.
Publication date
January 2019
DOI Publisher
Institute of Electrical and Electronics Engineers (IEEE)Abstract
The characteristic temperatures of the magnetostructural phase transition in lamella of the Heusler alloy Ni50Mn18.5Ga25Cu6.5 increase with decreasing geometric dimensions to nanometers. The martensite phase was detected in the nanoscale portion at temperatures above M-s = 309 K by transmission electron microscopy, whereas only the austenite phase existed in the microsize part of the sample. The shift of the characteristic temperatures with decreasing sizes of samples must be taken into account when creating microelectromechanical systems based on Heusler alloys
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