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

Positron 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 transfo...

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Autores: Unzueta, Iraultza, Alonso de Robador Lorente, Daniel, Cesari, Eduard, Sánchez-Alarcos Gómez, Vicente, Recarte Callado, Vicente, Pérez de Landazábal Berganzo, José Ignacio, García, José Ángel, Plazaola, Fernando
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2019
País:España
Institución:Universidad Pública de Navarra
Repositorio:Academica-e. Repositorio Institucional de la Universidad Pública de Navarra
OAI Identifier:oai:academica-e.unavarra.es:2454/35939
Acceso en línea:https://hdl.handle.net/2454/35939
Access Level:acceso abierto
Palabra clave:Ferromagnetism
Martensitic phase transition
Heusler alloy
Density functional theory
Differential scanning calorimetry
Electron-correlation calculations
Positron annihilation spectroscopy
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spelling Experimental observation of vacancy-assisted martensitic transformation shift in Ni-Fe-Ga alloysUnzueta, IraultzaAlonso de Robador Lorente, DanielCesari, EduardSánchez-Alarcos Gómez, VicenteRecarte Callado, VicentePérez de Landazábal Berganzo, José IgnacioGarcía, José ÁngelPlazaola, FernandoFerromagnetismMartensitic phase transitionHeusler alloyDensity functional theoryDifferential scanning calorimetryElectron-correlation calculationsPositron annihilation spectroscopyPositron 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.This 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.American Physical SocietyZientziakInstitute for Advanced Materials and Mathematics - INAMAT2Ciencias2019info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://hdl.handle.net/2454/35939reponame:Academica-e. Repositorio Institucional de la Universidad Pública de Navarrainstname:Universidad Pública de NavarraInglésinfo:eu-repo/grantAgreement/MINECO//MAT2015-65165-C2-1-Rinfo:eu-repo/grantAgreement/MINECO//MAT2014-56116-C4-1-R© 2019 American Physical Societyinfo:eu-repo/semantics/openAccessoai:academica-e.unavarra.es:2454/359392026-06-17T12:41:47Z
dc.title.none.fl_str_mv Experimental observation of vacancy-assisted martensitic transformation shift in Ni-Fe-Ga alloys
title Experimental observation of vacancy-assisted martensitic transformation shift in Ni-Fe-Ga alloys
spellingShingle Experimental observation of vacancy-assisted martensitic transformation shift in Ni-Fe-Ga alloys
Unzueta, Iraultza
Ferromagnetism
Martensitic phase transition
Heusler alloy
Density functional theory
Differential scanning calorimetry
Electron-correlation calculations
Positron annihilation spectroscopy
title_short Experimental observation of vacancy-assisted martensitic transformation shift in Ni-Fe-Ga alloys
title_full Experimental observation of vacancy-assisted martensitic transformation shift in Ni-Fe-Ga alloys
title_fullStr Experimental observation of vacancy-assisted martensitic transformation shift in Ni-Fe-Ga alloys
title_full_unstemmed Experimental observation of vacancy-assisted martensitic transformation shift in Ni-Fe-Ga alloys
title_sort Experimental observation of vacancy-assisted martensitic transformation shift in Ni-Fe-Ga alloys
dc.creator.none.fl_str_mv Unzueta, Iraultza
Alonso de Robador Lorente, Daniel
Cesari, Eduard
Sánchez-Alarcos Gómez, Vicente
Recarte Callado, Vicente
Pérez de Landazábal Berganzo, José Ignacio
García, José Ángel
Plazaola, Fernando
author Unzueta, Iraultza
author_facet Unzueta, Iraultza
Alonso de Robador Lorente, Daniel
Cesari, Eduard
Sánchez-Alarcos Gómez, Vicente
Recarte Callado, Vicente
Pérez de Landazábal Berganzo, José Ignacio
García, José Ángel
Plazaola, Fernando
author_role author
author2 Alonso de Robador Lorente, Daniel
Cesari, Eduard
Sánchez-Alarcos Gómez, Vicente
Recarte Callado, Vicente
Pérez de Landazábal Berganzo, José Ignacio
García, José Ángel
Plazaola, Fernando
author2_role author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv Zientziak
Institute for Advanced Materials and Mathematics - INAMAT2
Ciencias
dc.subject.none.fl_str_mv Ferromagnetism
Martensitic phase transition
Heusler alloy
Density functional theory
Differential scanning calorimetry
Electron-correlation calculations
Positron annihilation spectroscopy
topic Ferromagnetism
Martensitic phase transition
Heusler alloy
Density functional theory
Differential scanning calorimetry
Electron-correlation calculations
Positron annihilation spectroscopy
description Positron 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.
publishDate 2019
dc.date.none.fl_str_mv 2019
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2454/35939
url https://hdl.handle.net/2454/35939
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv info:eu-repo/grantAgreement/MINECO//MAT2015-65165-C2-1-R
info:eu-repo/grantAgreement/MINECO//MAT2014-56116-C4-1-R
dc.rights.none.fl_str_mv © 2019 American Physical Society
info:eu-repo/semantics/openAccess
rights_invalid_str_mv © 2019 American Physical Society
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv American Physical Society
publisher.none.fl_str_mv American Physical Society
dc.source.none.fl_str_mv reponame:Academica-e. Repositorio Institucional de la Universidad Pública de Navarra
instname:Universidad Pública de Navarra
instname_str Universidad Pública de Navarra
reponame_str Academica-e. Repositorio Institucional de la Universidad Pública de Navarra
collection Academica-e. Repositorio Institucional de la Universidad Pública de Navarra
repository.name.fl_str_mv
repository.mail.fl_str_mv
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