Muon-Spin-Rotation study of yttria-stabilized zirconia (ZrO2:Y): Evidence for muon and electron separate traps
Autor(a) principal: | |
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Data de Publicação: | 2014 |
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/10316/102619 https://doi.org/10.1088/1742-6596/551/1/012050 |
Resumo: | This paper is part of an extended study of oxide materials with the SR technique. As an example, we present here experimental data on yttria-stabilized zirconia (ZrO2 doped with 8% Y2O3). Three di erent muon states can be distinguished: i) Deep muonium (less than 17(1)% fraction), seen as a fast-relaxing signal or indirectly via decoupling measurements in high longitudinal elds, ii) + in a paramagnetic environment 62(6)% fraction), characterized by a very weak but clearly-visible hyper ne interaction, and iii) diamagnetic muon 21(1)% fraction); the diamagnetic signal is broadened only by the interaction with nuclear moments. The state corresponding to + in a paramagnetic environment and the diamagnetic state are attributed to the same (oxygen-bound) muon con guration, but we assume that they have di erent electron surroundings (with or without an unpaired electron in the vicinity). The paramagnetic electron is not captured in the Coulomb potential of the positive muon but is self-trapped (polaron formation) at a nearby Zr ion. The distant electron interacts with the muon only via dipolar magnetic elds. This explains the very weak hyper ne interaction felt by the + state in a paramagnetic environment. A further result of the experiment is that the disappearance of this signal with increasing temperature is not due to ionization of an electron shallowly bound to the muon but is caused by rapid spin uctuations of the electron, averaging the hyper ne interaction to zero. |
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Muon-Spin-Rotation study of yttria-stabilized zirconia (ZrO2:Y): Evidence for muon and electron separate trapsThis paper is part of an extended study of oxide materials with the SR technique. As an example, we present here experimental data on yttria-stabilized zirconia (ZrO2 doped with 8% Y2O3). Three di erent muon states can be distinguished: i) Deep muonium (less than 17(1)% fraction), seen as a fast-relaxing signal or indirectly via decoupling measurements in high longitudinal elds, ii) + in a paramagnetic environment 62(6)% fraction), characterized by a very weak but clearly-visible hyper ne interaction, and iii) diamagnetic muon 21(1)% fraction); the diamagnetic signal is broadened only by the interaction with nuclear moments. The state corresponding to + in a paramagnetic environment and the diamagnetic state are attributed to the same (oxygen-bound) muon con guration, but we assume that they have di erent electron surroundings (with or without an unpaired electron in the vicinity). The paramagnetic electron is not captured in the Coulomb potential of the positive muon but is self-trapped (polaron formation) at a nearby Zr ion. The distant electron interacts with the muon only via dipolar magnetic elds. This explains the very weak hyper ne interaction felt by the + state in a paramagnetic environment. A further result of the experiment is that the disappearance of this signal with increasing temperature is not due to ionization of an electron shallowly bound to the muon but is caused by rapid spin uctuations of the electron, averaging the hyper ne interaction to zero.2014info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://hdl.handle.net/10316/102619http://hdl.handle.net/10316/102619https://doi.org/10.1088/1742-6596/551/1/012050eng1742-6596Vieira, R. B. L.Vilão, R. C.Gordo, P. M.Marinopoulos, ApostolosAlberto, H. V.Duarte, J. PirotoGil, J. M.Weidinger, A.Lord, J. S.info: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:RCAAP2022-10-04T20:31:24Zoai:estudogeral.uc.pt:10316/102619Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T21:19:34.305996Repositório 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 |
Muon-Spin-Rotation study of yttria-stabilized zirconia (ZrO2:Y): Evidence for muon and electron separate traps |
title |
Muon-Spin-Rotation study of yttria-stabilized zirconia (ZrO2:Y): Evidence for muon and electron separate traps |
spellingShingle |
Muon-Spin-Rotation study of yttria-stabilized zirconia (ZrO2:Y): Evidence for muon and electron separate traps Vieira, R. B. L. |
title_short |
Muon-Spin-Rotation study of yttria-stabilized zirconia (ZrO2:Y): Evidence for muon and electron separate traps |
title_full |
Muon-Spin-Rotation study of yttria-stabilized zirconia (ZrO2:Y): Evidence for muon and electron separate traps |
title_fullStr |
Muon-Spin-Rotation study of yttria-stabilized zirconia (ZrO2:Y): Evidence for muon and electron separate traps |
title_full_unstemmed |
Muon-Spin-Rotation study of yttria-stabilized zirconia (ZrO2:Y): Evidence for muon and electron separate traps |
title_sort |
Muon-Spin-Rotation study of yttria-stabilized zirconia (ZrO2:Y): Evidence for muon and electron separate traps |
author |
Vieira, R. B. L. |
author_facet |
Vieira, R. B. L. Vilão, R. C. Gordo, P. M. Marinopoulos, Apostolos Alberto, H. V. Duarte, J. Piroto Gil, J. M. Weidinger, A. Lord, J. S. |
author_role |
author |
author2 |
Vilão, R. C. Gordo, P. M. Marinopoulos, Apostolos Alberto, H. V. Duarte, J. Piroto Gil, J. M. Weidinger, A. Lord, J. S. |
author2_role |
author author author author author author author author |
dc.contributor.author.fl_str_mv |
Vieira, R. B. L. Vilão, R. C. Gordo, P. M. Marinopoulos, Apostolos Alberto, H. V. Duarte, J. Piroto Gil, J. M. Weidinger, A. Lord, J. S. |
description |
This paper is part of an extended study of oxide materials with the SR technique. As an example, we present here experimental data on yttria-stabilized zirconia (ZrO2 doped with 8% Y2O3). Three di erent muon states can be distinguished: i) Deep muonium (less than 17(1)% fraction), seen as a fast-relaxing signal or indirectly via decoupling measurements in high longitudinal elds, ii) + in a paramagnetic environment 62(6)% fraction), characterized by a very weak but clearly-visible hyper ne interaction, and iii) diamagnetic muon 21(1)% fraction); the diamagnetic signal is broadened only by the interaction with nuclear moments. The state corresponding to + in a paramagnetic environment and the diamagnetic state are attributed to the same (oxygen-bound) muon con guration, but we assume that they have di erent electron surroundings (with or without an unpaired electron in the vicinity). The paramagnetic electron is not captured in the Coulomb potential of the positive muon but is self-trapped (polaron formation) at a nearby Zr ion. The distant electron interacts with the muon only via dipolar magnetic elds. This explains the very weak hyper ne interaction felt by the + state in a paramagnetic environment. A further result of the experiment is that the disappearance of this signal with increasing temperature is not due to ionization of an electron shallowly bound to the muon but is caused by rapid spin uctuations of the electron, averaging the hyper ne interaction to zero. |
publishDate |
2014 |
dc.date.none.fl_str_mv |
2014 |
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/10316/102619 http://hdl.handle.net/10316/102619 https://doi.org/10.1088/1742-6596/551/1/012050 |
url |
http://hdl.handle.net/10316/102619 https://doi.org/10.1088/1742-6596/551/1/012050 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
1742-6596 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
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 |
instname_str |
Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
instacron_str |
RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
repository.mail.fl_str_mv |
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1799134089926672384 |