Low temperature a/b nanotwins in Ni50Mn25+xGa25x Heusler alloys

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dc.contributor.authorStraka, Ladislavcs
dc.contributor.authorDrahokoupil, Jancs
dc.contributor.authorVeřtát, Petrcs
dc.contributor.authorZelený, Martincs
dc.contributor.authorKopeček, Jaromírcs
dc.contributor.authorSozinov, Alexeics
dc.contributor.authorHeczko, Olegcs
dc.coverage.issue1cs
dc.coverage.volume8cs
dc.date.issued2018-08-09cs
dc.description.abstractWe have found low temperature a/b nanotwins having (110) twinning plane in a five-layered modulated martensite phase of Ni50Mn25+xGa25x (at. %) Heusler alloys and identified the particular region in phase diagram where the nanotwinning occurs. Evolution of the structure with decreasing temperature was studied by X-ray diffraction using single crystals exhibiting magnetic shape memory effect. The merging of (400) and (040) lines upon cooling for 2.6 < x < 3.5 indicated a/b nanotwinning originating from the refinement of initially coarse a/b twins. Refinement of the twins with decreasing temperature was observed directly using scanning electron microscopy. The prerequisite for nanotwinning is an extremely low twin boundary energy, which we estimated using first-principles calculations to be 0.16 meV/2. As the nanotwinning distorts the relation between the crystal lattice and the X-ray diffraction pattern, it should be taken into consideration in structural studies of Ni-Mn-Ga Heusler alloys.en
dc.formattextcs
dc.format.extent11943--cs
dc.format.mimetypeapplication/pdfcs
dc.identifier.citationScientific Reports. 2018, vol. 8, issue 1, p. 11943--.en
dc.identifier.doi10.1038/s41598-018-30388-8cs
dc.identifier.issn2045-2322cs
dc.identifier.orcid0000-0001-6715-4088cs
dc.identifier.other149142cs
dc.identifier.researcheridC-5602-2013cs
dc.identifier.scopus57076741200cs
dc.identifier.urihttp://hdl.handle.net/11012/179549
dc.language.isoencs
dc.publisherSpringer Naturecs
dc.relation.ispartofScientific Reportscs
dc.relation.urihttp://link.springer.com/article/10.1038/s41598-018-30388-8cs
dc.rightsCreative Commons Attribution 4.0 Internationalcs
dc.rights.accessopenAccesscs
dc.rights.sherpahttp://www.sherpa.ac.uk/romeo/issn/2045-2322/cs
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/cs
dc.subjectnanotwinningen
dc.subjectmagnetic shape memory alloyen
dc.subjectHeusler alloysen
dc.titleLow temperature a/b nanotwins in Ni50Mn25+xGa25x Heusler alloysen
dc.type.driverarticleen
dc.type.statusPeer-revieweden
dc.type.versionpublishedVersionen
sync.item.dbidVAV-149142en
sync.item.dbtypeVAVen
sync.item.insts2025.02.03 15:48:59en
sync.item.modts2025.01.17 18:46:56en
thesis.grantorVysoké učení technické v Brně. Fakulta strojního inženýrství. Ústav materiálových věd a inženýrstvícs
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