Number of the records: 1
Nanotwinned (inter)martensite transformation interfaces in Ni.sub.50./sub.Mn.sub.25./sub.Ga.sub.20./sub.Fe.sub.5./sub. magnetic shape memory single crystal foil
- 1.0561686 - FZÚ 2023 RIV US eng J - Journal Article
Ge, Yanling - Straka, Ladislav - Vronka, Marek - Rameš, Michal - Sozinov, A. - Heczko, Oleg
Nanotwinned (inter)martensite transformation interfaces in Ni50Mn25Ga20Fe5 magnetic shape memory single crystal foil.
Materials Characterization. Roč. 190, Aug (2022), č. článku 112007. ISSN 1044-5803. E-ISSN 1873-4189
R&D Projects: GA MŠMT(CZ) EF16_019/0000760; GA MŠMT LM2018110; GA ČR GA19-09882S
Grant - others:OP VVV - SOLID21(XE) CZ.02.1.01/0.0/0.0/16_019/0000760
Institutional support: RVO:68378271
Keywords : intermetallics * atomic scale structure * microstructure * phase transitions * transmission electron microscopy
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 4.7, year: 2022
Method of publishing: Limited access
https://doi.org/ 10.1016/j.matchar.2022.112007
Using common and high resolution transmission electron microscopy (TEM), we study the magnetic and crystal phase structures as well as their evolution in Ni50Mn25Ga20Fe5 magnetic shape memory material with high Curie point. The particular alloying by Fe and changing thickness of the TEM foil enable us to observe all martensitic phases known in Ni-Mn-Ga Heusler alloy system and their respective transitions simultaneously. Starting from cubic austenite at about 10 nm foil thickness, the structure evolves via peculiar interleaved stripes of austenite and five-layered modulated 10M martensite to pure 10M phase with a low density of stacking faults at 40 nm thickness. With further increasing thickness, the 10M phase transforms gradually to seven-layered modulated 14M martensite with an increased density of stacking faults. Finally, the non-modulated tetragonal NM phase appears within the 14M phase by detwinning of nanotwins forming the modulated phases.
Permanent Link: https://hdl.handle.net/11104/0334203
Number of the records: 1