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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
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SYSNO ASEP 0561686 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Nanotwinned (inter)martensite transformation interfaces in Ni50Mn25Ga20Fe5 magnetic shape memory single crystal foil Author(s) Ge, Yanling (FZU-D) ORCID
Straka, Ladislav (FZU-D) ORCID
Vronka, Marek (FZU-D) ORCID, RID
Rameš, Michal (FZU-D) RID, ORCID
Sozinov, A. (FI)
Heczko, Oleg (FZU-D) RID, ORCIDNumber of authors 6 Article number 112007 Source Title Materials Characterization. - : Elsevier - ISSN 1044-5803
Roč. 190, Aug (2022)Number of pages 13 s. Language eng - English Country US - United States Keywords intermetallics ; atomic scale structure ; microstructure ; phase transitions ; transmission electron microscopy Subject RIV BM - Solid Matter Physics ; Magnetism OECD category Condensed matter physics (including formerly solid state physics, supercond.) R&D Projects EF16_019/0000760 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) LM2018110 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) GA19-09882S GA ČR - Czech Science Foundation (CSF) Method of publishing Limited access Institutional support FZU-D - RVO:68378271 UT WOS 000833519500001 EID SCOPUS 85131395905 DOI 10.1016/j.matchar.2022.112007 Annotation 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.
Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2023 Electronic address https://doi.org/ 10.1016/j.matchar.2022.112007
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