Improving the room-temperature ferromagnetism in ZnO and low-doped ZnO:Ag films using GLAD sputtering
Autor(a) principal: | |
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Data de Publicação: | 2021 |
Outros Autores: | , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/1822/74898 |
Resumo: | ZnO and doped ZnO films with non-ferromagnetic metal have been widely used as biosensor elements. In these studies, the electrochemical measurements are explored, though the electrical impedance of the system. In this sense, the ferromagnetic properties of the material can be used for multifunctionalization of the sensor element using external magnetic fields during the measurements. Within this context, we investigate the room-temperature ferromagnetism in pure ZnO and Ag-doped ZnO films presenting zigzag-like columnar geometry. Specifically, we focus on the films’ structural and quasi-static magnetic properties and disclose that they evolve with the doping of low-Ag concentrations and the columnar geometry employed during the deposition. The magnetic characterization reveals ferromagnetic behavior at room temperature for all studied samples, including the pure ZnO one. By considering computational simulations, we address the origin of ferromagnetism in ZnO and Ag-doped ZnO and interpret our results in terms of the Zn vacancy dynamics, its substitution by an Ag atom in the site, and the influence of the columnar geometry on the magnetic properties of the films. Our findings bring to light an exciting way to induce/explore the room-temperature ferromagnetism of a non-ferromagnetic metal-doped semiconductor as a promising candidate for biosensor applications. |
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Improving the room-temperature ferromagnetism in ZnO and low-doped ZnO:Ag films using GLAD sputteringZinc oxideThin filmsGlancing Angle DepositionDopingBiosensorsSputteringScience & TechnologyZnO and doped ZnO films with non-ferromagnetic metal have been widely used as biosensor elements. In these studies, the electrochemical measurements are explored, though the electrical impedance of the system. In this sense, the ferromagnetic properties of the material can be used for multifunctionalization of the sensor element using external magnetic fields during the measurements. Within this context, we investigate the room-temperature ferromagnetism in pure ZnO and Ag-doped ZnO films presenting zigzag-like columnar geometry. Specifically, we focus on the films’ structural and quasi-static magnetic properties and disclose that they evolve with the doping of low-Ag concentrations and the columnar geometry employed during the deposition. The magnetic characterization reveals ferromagnetic behavior at room temperature for all studied samples, including the pure ZnO one. By considering computational simulations, we address the origin of ferromagnetism in ZnO and Ag-doped ZnO and interpret our results in terms of the Zn vacancy dynamics, its substitution by an Ag atom in the site, and the influence of the columnar geometry on the magnetic properties of the films. Our findings bring to light an exciting way to induce/explore the room-temperature ferromagnetism of a non-ferromagnetic metal-doped semiconductor as a promising candidate for biosensor applications.This works was partially supported by the Brazilian agencies CNPq and CAPES. Furthermore, this work was also supported by the Portuguese Foundation for Science and Technology (FCT) in the framework of the Strategic Funding UID/FIS/04650/2019 and project PTDC/BTMMAT/28237/2017. A. Ferreira thanks FCT for the contract under the Stimulus of Scientific Employment (CTTI-31/18–CF (2) junior researcher contract). RMT thanks the Center for Computational Engineering & Sciences (CCES) at Unicamp for financial support through the FAPESP/CEPID Grant 2013/08293-7. LDM would also like to thank the support of the High-Performance Computing Center at UFRN (NPAD/UFRN). The work reported in this paper was supported by On-Surf Mobilizar Competencias Tecnologicas em Engenharia de Superficies, Project POCI-01-0247-FEDER-024521.Multidisciplinary Digital Publishing Institute (MDPI)Universidade do MinhoCorrea, Marcio A.Ferreira, Armando José BarrosTromer, Raphael M.Machado, Leonardo D.Gamino, MatheusFrança Junior, Sergio A. N.Bohn, FelipeVaz, F.2021-09-162021-09-16T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/1822/74898engCorrea, M.A.; Ferreira, A.; Tromer, R.M.; Machado, L.D.; Gamino, M.; França Junior, S.A.N.; Bohn, F.; Vaz, F. Improving the Room-Temperature Ferromagnetism in ZnO and Low-Doped ZnO:Ag Films Using GLAD Sputtering. Materials 2021, 14, 5337. https://doi.org/10.3390/ma141853371996-194410.3390/ma14185337https://www.mdpi.com/1996-1944/14/18/5337info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-07-21T12:22:26Zoai:repositorium.sdum.uminho.pt:1822/74898Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T19:15:55.799335Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Improving the room-temperature ferromagnetism in ZnO and low-doped ZnO:Ag films using GLAD sputtering |
title |
Improving the room-temperature ferromagnetism in ZnO and low-doped ZnO:Ag films using GLAD sputtering |
spellingShingle |
Improving the room-temperature ferromagnetism in ZnO and low-doped ZnO:Ag films using GLAD sputtering Correa, Marcio A. Zinc oxide Thin films Glancing Angle Deposition Doping Biosensors Sputtering Science & Technology |
title_short |
Improving the room-temperature ferromagnetism in ZnO and low-doped ZnO:Ag films using GLAD sputtering |
title_full |
Improving the room-temperature ferromagnetism in ZnO and low-doped ZnO:Ag films using GLAD sputtering |
title_fullStr |
Improving the room-temperature ferromagnetism in ZnO and low-doped ZnO:Ag films using GLAD sputtering |
title_full_unstemmed |
Improving the room-temperature ferromagnetism in ZnO and low-doped ZnO:Ag films using GLAD sputtering |
title_sort |
Improving the room-temperature ferromagnetism in ZnO and low-doped ZnO:Ag films using GLAD sputtering |
author |
Correa, Marcio A. |
author_facet |
Correa, Marcio A. Ferreira, Armando José Barros Tromer, Raphael M. Machado, Leonardo D. Gamino, Matheus França Junior, Sergio A. N. Bohn, Felipe Vaz, F. |
author_role |
author |
author2 |
Ferreira, Armando José Barros Tromer, Raphael M. Machado, Leonardo D. Gamino, Matheus França Junior, Sergio A. N. Bohn, Felipe Vaz, F. |
author2_role |
author author author author author author author |
dc.contributor.none.fl_str_mv |
Universidade do Minho |
dc.contributor.author.fl_str_mv |
Correa, Marcio A. Ferreira, Armando José Barros Tromer, Raphael M. Machado, Leonardo D. Gamino, Matheus França Junior, Sergio A. N. Bohn, Felipe Vaz, F. |
dc.subject.por.fl_str_mv |
Zinc oxide Thin films Glancing Angle Deposition Doping Biosensors Sputtering Science & Technology |
topic |
Zinc oxide Thin films Glancing Angle Deposition Doping Biosensors Sputtering Science & Technology |
description |
ZnO and doped ZnO films with non-ferromagnetic metal have been widely used as biosensor elements. In these studies, the electrochemical measurements are explored, though the electrical impedance of the system. In this sense, the ferromagnetic properties of the material can be used for multifunctionalization of the sensor element using external magnetic fields during the measurements. Within this context, we investigate the room-temperature ferromagnetism in pure ZnO and Ag-doped ZnO films presenting zigzag-like columnar geometry. Specifically, we focus on the films’ structural and quasi-static magnetic properties and disclose that they evolve with the doping of low-Ag concentrations and the columnar geometry employed during the deposition. The magnetic characterization reveals ferromagnetic behavior at room temperature for all studied samples, including the pure ZnO one. By considering computational simulations, we address the origin of ferromagnetism in ZnO and Ag-doped ZnO and interpret our results in terms of the Zn vacancy dynamics, its substitution by an Ag atom in the site, and the influence of the columnar geometry on the magnetic properties of the films. Our findings bring to light an exciting way to induce/explore the room-temperature ferromagnetism of a non-ferromagnetic metal-doped semiconductor as a promising candidate for biosensor applications. |
publishDate |
2021 |
dc.date.none.fl_str_mv |
2021-09-16 2021-09-16T00:00:00Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/1822/74898 |
url |
http://hdl.handle.net/1822/74898 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Correa, M.A.; Ferreira, A.; Tromer, R.M.; Machado, L.D.; Gamino, M.; França Junior, S.A.N.; Bohn, F.; Vaz, F. Improving the Room-Temperature Ferromagnetism in ZnO and Low-Doped ZnO:Ag Films Using GLAD Sputtering. Materials 2021, 14, 5337. https://doi.org/10.3390/ma14185337 1996-1944 10.3390/ma14185337 https://www.mdpi.com/1996-1944/14/18/5337 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Multidisciplinary Digital Publishing Institute (MDPI) |
publisher.none.fl_str_mv |
Multidisciplinary Digital Publishing Institute (MDPI) |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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RCAAP |
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RCAAP |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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