Experimental observation of vacancy-assisted martensitic transformation shift in Ni-Fe-Ga alloys

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dc.contributor.authorUnzueta, Iraultza
dc.contributor.authorAlonso de Robador Lorente, Daniel
dc.contributor.authorCesari, Eduard
dc.contributor.authorSánchez-Alarcos Gómez, Vicente
dc.contributor.authorRecarte Callado, Vicente
dc.contributor.authorPérez de Landazábal Berganzo, José Ignacio
dc.contributor.authorGarcía, José Ángel
dc.contributor.authorPlazaola, Fernando
dc.contributor.departmentZientziakeu
dc.contributor.departmentInstitute for Advanced Materials and Mathematics - INAMAT2en
dc.contributor.departmentCienciases_ES
dc.date.accessioned2019-12-20T09:14:03Z
dc.date.available2019-12-20T09:14:03Z
dc.date.issued2019
dc.description.abstractPositron annihilation lifetime spectroscopy is used to experimentally demonstrate the direct relationship between vacancies and the shift of the martensitic transformation temperature in a Ni55Fel7Ga28 alloy. The evolution of vacancies assisting the ordering enables shifts of the martensitic transformation up to 50 K. Our results confirm the role that both vacancy concentration and different vacancy dynamics play in samples quenched from the L2(1) and B2 phases, which dictate the martensitic transformation temperature and its subsequent evolution. Finally, by electron-positron density functional calculations V-Ni is identified as the most probable vacancy present in Ni55Fe17Ga28. This work evidences the capability of vacancies for the fine-tuning of the martensitic transformation temperature, paving the way for defect engineering of multifunctional properties.en
dc.description.sponsorshipThis work is supported by the Basque Government Grant No. IT-1005-16 and by the Spanish Ministry of Economy and Competitiveness under the Projects No. MAT2015-65165-C2-R (MINECO/FEDER) and No. MAT2014-56116-C4-1-R (AEI/FEDER). I. U. acknowledges the Basque Government Grant No. PRE-2014-214.en
dc.format.extent7 p.
dc.format.mimetypeapplication/pdfen
dc.identifier.citationExperimental Observation of Vacancy-assisted Martensitic Transformation Shift in Ni-Fe-Ga Alloys, Unzueta, I., de R-Lorente, D. Alonso, Cesari, E., Sanchez-Alarcos, V., Recarte, V., Perez-Landazabal, J. I., Garcia, J. A., Plazaola, F. Phys. Rev. Lett., 122, 16, 165701, 7, 2019, Apr, American Physical Society, 10.1103/PhysRevLett.122.165701, https://link.aps.org/doi/10.1103/PhysRevLett.122.165701en
dc.identifier.doi10.1103/PhysRevLett.122.165701
dc.identifier.issn0031-9007
dc.identifier.urihttps://academica-e.unavarra.es/handle/2454/35939
dc.language.isoengen
dc.publisherAmerican Physical Societyen
dc.relation.ispartofPhysical Review Letters, 2019, 122 (16)en
dc.relation.projectIDinfo:eu-repo/grantAgreement/MINECO//MAT2015-65165-C2-1-R/ES/
dc.relation.projectIDinfo:eu-repo/grantAgreement/MINECO//MAT2014-56116-C4-1-R/ES/
dc.relation.publisherversionhttps://doi.org/10.1103/PhysRevLett.122.165701
dc.rights© 2019 American Physical Societyen
dc.rights.accessRightsinfo:eu-repo/semantics/openAccess
dc.subjectFerromagnetismen
dc.subjectMartensitic phase transitionen
dc.subjectHeusler alloyen
dc.subjectDensity functional theoryen
dc.subjectDifferential scanning calorimetryen
dc.subjectElectron-correlation calculationsen
dc.subjectPositron annihilation spectroscopyen
dc.titleExperimental observation of vacancy-assisted martensitic transformation shift in Ni-Fe-Ga alloysen
dc.typeinfo:eu-repo/semantics/article
dc.type.versioninfo:eu-repo/semantics/publishedVersion
dspace.entity.typePublication
relation.isAuthorOfPublication2f19e688-32aa-4a3e-a414-93d7a2226faa
relation.isAuthorOfPublication49e03bba-a2f3-4ce4-91ea-4599a15d3043
relation.isAuthorOfPublicationba6d2296-6efb-4d69-83a7-c642e44b6e69
relation.isAuthorOfPublication.latestForDiscovery2f19e688-32aa-4a3e-a414-93d7a2226faa

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