Polar and antipolar polymorphs of metastable perovskite BiFe0.5Sc0.5O3
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/10773/20942 |
Resumo: | A metastable perovskite BiFe0.5Sc0.5O3 synthesized under high-pressure (6 GPa) and high-temperature (1500 K) conditions was obtained in two different polymorphs, antipolar Pnma and polar Ima2, through an irreversible behavior under a heating/cooling thermal cycling. The Ima2 phase represents an original type of a canted ferroelectric structure where Bi3+ cations exhibit both polar and antipolar displacements along the orthogonal [110](p) and [1 (1) over bar0](p) pseudocubic directions, respectively, and are combined with antiphase octahedral tilting about the polar axis. Both the Pnma and the Ima2 structural modifications exhibit a long-range antiferromagnetic ordering with a weak ferromagnetic component below T-N similar to 220 K. Analysis of the coupling between the dipole, magnetic, and elastic order parameters based on a general phenomenological approach revealed that the weak ferromagnetism in both phases is mainly caused by the presence of the antiphase octahedral tilting whose axial nature directly represents the relevant part of Dzyaloshinskii vector. The magnetoelectric contribution to the spontaneous magnetization allowed in the polar Ima2 phase is described by a fifth-degree free-energy invariant and is expected to be small. |
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Polar and antipolar polymorphs of metastable perovskite BiFe0.5Sc0.5O3GROUP-THEORETICAL ANALYSISMAGNETIC-PROPERTIESCRYSTAL-STRUCTUREBISMUTH FERRITEPHASE-BOUNDARYBIFEO3MULTIFERROICSTEMPERATURELANDA metastable perovskite BiFe0.5Sc0.5O3 synthesized under high-pressure (6 GPa) and high-temperature (1500 K) conditions was obtained in two different polymorphs, antipolar Pnma and polar Ima2, through an irreversible behavior under a heating/cooling thermal cycling. The Ima2 phase represents an original type of a canted ferroelectric structure where Bi3+ cations exhibit both polar and antipolar displacements along the orthogonal [110](p) and [1 (1) over bar0](p) pseudocubic directions, respectively, and are combined with antiphase octahedral tilting about the polar axis. Both the Pnma and the Ima2 structural modifications exhibit a long-range antiferromagnetic ordering with a weak ferromagnetic component below T-N similar to 220 K. Analysis of the coupling between the dipole, magnetic, and elastic order parameters based on a general phenomenological approach revealed that the weak ferromagnetism in both phases is mainly caused by the presence of the antiphase octahedral tilting whose axial nature directly represents the relevant part of Dzyaloshinskii vector. The magnetoelectric contribution to the spontaneous magnetization allowed in the polar Ima2 phase is described by a fifth-degree free-energy invariant and is expected to be small.AMER PHYSICAL SOC2017-12-07T20:04:53Z2014-01-01T00:00:00Z2014info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10773/20942eng1098-012110.1103/PhysRevB.89.174414Khalyavin, D. D.Salak, A. N.Olekhnovich, N. M.Pushkarev, A. V.Radyush, Yu. V.Manuel, P.Raevski, I. P.Zheludkevich, M. L.Ferreira, M. G. 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:RCAAP2024-05-06T04:10:12Zoai:ria.ua.pt:10773/20942Portal AgregadorONGhttps://www.rcaap.pt/oai/openairemluisa.alvim@gmail.comopendoar:71602024-05-06T04:10:12Repositório 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 |
Polar and antipolar polymorphs of metastable perovskite BiFe0.5Sc0.5O3 |
title |
Polar and antipolar polymorphs of metastable perovskite BiFe0.5Sc0.5O3 |
spellingShingle |
Polar and antipolar polymorphs of metastable perovskite BiFe0.5Sc0.5O3 Khalyavin, D. D. GROUP-THEORETICAL ANALYSIS MAGNETIC-PROPERTIES CRYSTAL-STRUCTURE BISMUTH FERRITE PHASE-BOUNDARY BIFEO3 MULTIFERROICS TEMPERATURE LA ND |
title_short |
Polar and antipolar polymorphs of metastable perovskite BiFe0.5Sc0.5O3 |
title_full |
Polar and antipolar polymorphs of metastable perovskite BiFe0.5Sc0.5O3 |
title_fullStr |
Polar and antipolar polymorphs of metastable perovskite BiFe0.5Sc0.5O3 |
title_full_unstemmed |
Polar and antipolar polymorphs of metastable perovskite BiFe0.5Sc0.5O3 |
title_sort |
Polar and antipolar polymorphs of metastable perovskite BiFe0.5Sc0.5O3 |
author |
Khalyavin, D. D. |
author_facet |
Khalyavin, D. D. Salak, A. N. Olekhnovich, N. M. Pushkarev, A. V. Radyush, Yu. V. Manuel, P. Raevski, I. P. Zheludkevich, M. L. Ferreira, M. G. S. |
author_role |
author |
author2 |
Salak, A. N. Olekhnovich, N. M. Pushkarev, A. V. Radyush, Yu. V. Manuel, P. Raevski, I. P. Zheludkevich, M. L. Ferreira, M. G. S. |
author2_role |
author author author author author author author author |
dc.contributor.author.fl_str_mv |
Khalyavin, D. D. Salak, A. N. Olekhnovich, N. M. Pushkarev, A. V. Radyush, Yu. V. Manuel, P. Raevski, I. P. Zheludkevich, M. L. Ferreira, M. G. S. |
dc.subject.por.fl_str_mv |
GROUP-THEORETICAL ANALYSIS MAGNETIC-PROPERTIES CRYSTAL-STRUCTURE BISMUTH FERRITE PHASE-BOUNDARY BIFEO3 MULTIFERROICS TEMPERATURE LA ND |
topic |
GROUP-THEORETICAL ANALYSIS MAGNETIC-PROPERTIES CRYSTAL-STRUCTURE BISMUTH FERRITE PHASE-BOUNDARY BIFEO3 MULTIFERROICS TEMPERATURE LA ND |
description |
A metastable perovskite BiFe0.5Sc0.5O3 synthesized under high-pressure (6 GPa) and high-temperature (1500 K) conditions was obtained in two different polymorphs, antipolar Pnma and polar Ima2, through an irreversible behavior under a heating/cooling thermal cycling. The Ima2 phase represents an original type of a canted ferroelectric structure where Bi3+ cations exhibit both polar and antipolar displacements along the orthogonal [110](p) and [1 (1) over bar0](p) pseudocubic directions, respectively, and are combined with antiphase octahedral tilting about the polar axis. Both the Pnma and the Ima2 structural modifications exhibit a long-range antiferromagnetic ordering with a weak ferromagnetic component below T-N similar to 220 K. Analysis of the coupling between the dipole, magnetic, and elastic order parameters based on a general phenomenological approach revealed that the weak ferromagnetism in both phases is mainly caused by the presence of the antiphase octahedral tilting whose axial nature directly represents the relevant part of Dzyaloshinskii vector. The magnetoelectric contribution to the spontaneous magnetization allowed in the polar Ima2 phase is described by a fifth-degree free-energy invariant and is expected to be small. |
publishDate |
2014 |
dc.date.none.fl_str_mv |
2014-01-01T00:00:00Z 2014 2017-12-07T20:04:53Z |
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/10773/20942 |
url |
http://hdl.handle.net/10773/20942 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
1098-0121 10.1103/PhysRevB.89.174414 |
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 |
AMER PHYSICAL SOC |
publisher.none.fl_str_mv |
AMER PHYSICAL SOC |
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 |
mluisa.alvim@gmail.com |
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1817543646527881216 |