Low-temperature terahertz spectroscopy of LaFeO3, PrFeO3, ErFeO3, and LuFeO3: Quasimagnon resonances and ground-state multiplet transitions

Autores
Massa, Nestor Emilio; Del Campo, Leire; Ta Phuoc, Vinh; Kayser, Paula; Alonso, José Antonio
Año de publicación
2023
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
We report on zone center THz excitations of non--Jahn Teller LaFeO3, PrFeO3, ErFeO3, and LuFeO3 distorted perovskites under external magnetic fields up 7 T. Our measurements on low temperature-low energy absorptions of LaFeO3 show antiferromagnetic and ferromagnetic magnons at ωAFM~31.4 and ωFM ~26.7 cm-1 in the Γ4 (Gx, Ay, Fz) representation with degeneracy near linearly lifted by the field. LuFeO3 is characterized by zero field magnetic resonances at ωAFM ~26.3 cm-1 and ωFM ~22.4 cm-1 in addition to Fe3+ Zeeman -split crystal field (CF) 6A1 ground transitions at ~10.4 cm-1 triggered by subtle structural deviations induced by the Lu 4f14 smaller ionic radius at the A site. This local quasi-non-centrosymmetric departure is also found in ErFeO3 (Kramers 4f11 Er3+ (4I15/2); Γ2 (Fx, Cy, Gz) Fil: Massa, Nestor Emilio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Química Inorgánica "Dr. Pedro J. Aymonino". Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Centro de Química Inorgánica "Dr. Pedro J. Aymonino"; Argentina
Fil: Del Campo, Leire. Université d Orléans; Francia
Fil: Ta Phuoc, Vinh. Universite de Tours; Francia
Fil: Kayser, Paula. University of Edinburgh; Reino Unido
Fil: Alonso, José Antonio. Instituto de Ciencia de Materiales de Madrid; España. Consejo Superior de Investigaciones Científicas; España
Materia
RFeO3 R= Rare Earth (La, Pr, Er, Lu)
MAGNON RESONANCES
MULTIPLET TRANSITIONS
THz SPECTROSCOPY
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/227229
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/227229
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Low-temperature terahertz spectroscopy of LaFeO3, PrFeO3, ErFeO3, and LuFeO3: Quasimagnon resonances and ground-state multiplet transitionsMassa, Nestor EmilioDel Campo, LeireTa Phuoc, VinhKayser, PaulaAlonso, José AntonioRFeO3 R= Rare Earth (La, Pr, Er, Lu)MAGNON RESONANCESMULTIPLET TRANSITIONSTHz SPECTROSCOPYhttps://purl.org/becyt/ford/1.3https://purl.org/becyt/ford/1We report on zone center THz excitations of non--Jahn Teller LaFeO3, PrFeO3, ErFeO3, and LuFeO3 distorted perovskites under external magnetic fields up 7 T. Our measurements on low temperature-low energy absorptions of LaFeO3 show antiferromagnetic and ferromagnetic magnons at ωAFM~31.4 and ωFM ~26.7 cm-1 in the Γ4 (Gx, Ay, Fz) representation with degeneracy near linearly lifted by the field. LuFeO3 is characterized by zero field magnetic resonances at ωAFM ~26.3 cm-1 and ωFM ~22.4 cm-1 in addition to Fe3+ Zeeman -split crystal field (CF) 6A1 ground transitions at ~10.4 cm-1 triggered by subtle structural deviations induced by the Lu 4f14 smaller ionic radius at the A site. This local quasi-non-centrosymmetric departure is also found in ErFeO3 (Kramers 4f11 Er3+ (4I15/2); Γ2 (Fx, Cy, Gz) <TSR ~93 K), but with the ~4 cm-1 Fe3+ Zeeman branching strongly biased toward higher energies due to 3d-4f exchange. Magnons at ωAFM ~31.5 cm-1 and ωFM ~21.5 cm-1 in ErFeO3 do not undergo field induced band splits but a 13-fold increase in the antiferro (ωAMF) /ferro(ωAFM) intensity ratio. There is a remarkable field-dependent CF matching population balance between Fe3+ higher and Er3+ lower Zeeman branches. The Er3+ (4I15/2) multiplet, at the 49.5 cm-1, 110.5 cm-1, and 167.3 cm-1, coincides with external lattice mode frequencies suggesting strong lattice driven spin-phonon interactions. Far infrared absorption ratios under mild external fields reveal magnetic dependence only for those zone center phonons involving moving magnetic ions. Antiferro- and ferro- resonances in PrFeO3 turn much broader as non-Kramers Pr3 introduces ligand changes at the A site leading into near degeneracy the antiferromagnetic mode and the lowest Pr3+ CF transition. They merge into a single broad mostly unresolved feature at 7 T. We conclude that low energy excitations in RFeO3 (R=rare earth) strongly depend on the lanthanide ionic size thus indivisibly tied to the mechanism associated to the origin of canted ferromagnetism. In addition, minute lattice displacements also underlie considering noncentrosymmetric the most distorted RFeO3 (R=rare earth). In these perovskites the changes triggered in the lattice by the smaller rare earth and the nonlinear intrinsic oxygen ion polarizability, known to drive lattice instabilities, provide grounds for interplay of ionic and electronic interactions yielding ferroelectric spontaneous polarization.Fil: Massa, Nestor Emilio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Química Inorgánica "Dr. Pedro J. Aymonino". Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Centro de Química Inorgánica "Dr. Pedro J. Aymonino"; ArgentinaFil: Del Campo, Leire. Université d Orléans; FranciaFil: Ta Phuoc, Vinh. Universite de Tours; FranciaFil: Kayser, Paula. University of Edinburgh; Reino UnidoFil: Alonso, José Antonio. Instituto de Ciencia de Materiales de Madrid; España. Consejo Superior de Investigaciones Científicas; EspañaAmerican Physical Society2023-02info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/227229Massa, Nestor Emilio; Del Campo, Leire; Ta Phuoc, Vinh; Kayser, Paula; Alonso, José Antonio; Low-temperature terahertz spectroscopy of LaFeO3, PrFeO3, ErFeO3, and LuFeO3: Quasimagnon resonances and ground-state multiplet transitions; American Physical Society; Physical Review B; 108; 11; 2-2023; 1-702331-84222331-8422CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://arxiv.org/abs/2303.02786info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevB.108.115116info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:55:42Zoai:ri.conicet.gov.ar:11336/227229instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 09:55:43.013CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Low-temperature terahertz spectroscopy of LaFeO3, PrFeO3, ErFeO3, and LuFeO3: Quasimagnon resonances and ground-state multiplet transitions
title Low-temperature terahertz spectroscopy of LaFeO3, PrFeO3, ErFeO3, and LuFeO3: Quasimagnon resonances and ground-state multiplet transitions
spellingShingle Low-temperature terahertz spectroscopy of LaFeO3, PrFeO3, ErFeO3, and LuFeO3: Quasimagnon resonances and ground-state multiplet transitions
Massa, Nestor Emilio
RFeO3 R= Rare Earth (La, Pr, Er, Lu)
MAGNON RESONANCES
MULTIPLET TRANSITIONS
THz SPECTROSCOPY
title_short Low-temperature terahertz spectroscopy of LaFeO3, PrFeO3, ErFeO3, and LuFeO3: Quasimagnon resonances and ground-state multiplet transitions
title_full Low-temperature terahertz spectroscopy of LaFeO3, PrFeO3, ErFeO3, and LuFeO3: Quasimagnon resonances and ground-state multiplet transitions
title_fullStr Low-temperature terahertz spectroscopy of LaFeO3, PrFeO3, ErFeO3, and LuFeO3: Quasimagnon resonances and ground-state multiplet transitions
title_full_unstemmed Low-temperature terahertz spectroscopy of LaFeO3, PrFeO3, ErFeO3, and LuFeO3: Quasimagnon resonances and ground-state multiplet transitions
title_sort Low-temperature terahertz spectroscopy of LaFeO3, PrFeO3, ErFeO3, and LuFeO3: Quasimagnon resonances and ground-state multiplet transitions
dc.creator.none.fl_str_mv Massa, Nestor Emilio
Del Campo, Leire
Ta Phuoc, Vinh
Kayser, Paula
Alonso, José Antonio
author Massa, Nestor Emilio
author_facet Massa, Nestor Emilio
Del Campo, Leire
Ta Phuoc, Vinh
Kayser, Paula
Alonso, José Antonio
author_role author
author2 Del Campo, Leire
Ta Phuoc, Vinh
Kayser, Paula
Alonso, José Antonio
author2_role author
author
author
author
dc.subject.none.fl_str_mv RFeO3 R= Rare Earth (La, Pr, Er, Lu)
MAGNON RESONANCES
MULTIPLET TRANSITIONS
THz SPECTROSCOPY
topic RFeO3 R= Rare Earth (La, Pr, Er, Lu)
MAGNON RESONANCES
MULTIPLET TRANSITIONS
THz SPECTROSCOPY
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.3
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv We report on zone center THz excitations of non--Jahn Teller LaFeO3, PrFeO3, ErFeO3, and LuFeO3 distorted perovskites under external magnetic fields up 7 T. Our measurements on low temperature-low energy absorptions of LaFeO3 show antiferromagnetic and ferromagnetic magnons at ωAFM~31.4 and ωFM ~26.7 cm-1 in the Γ4 (Gx, Ay, Fz) representation with degeneracy near linearly lifted by the field. LuFeO3 is characterized by zero field magnetic resonances at ωAFM ~26.3 cm-1 and ωFM ~22.4 cm-1 in addition to Fe3+ Zeeman -split crystal field (CF) 6A1 ground transitions at ~10.4 cm-1 triggered by subtle structural deviations induced by the Lu 4f14 smaller ionic radius at the A site. This local quasi-non-centrosymmetric departure is also found in ErFeO3 (Kramers 4f11 Er3+ (4I15/2); Γ2 (Fx, Cy, Gz) <TSR ~93 K), but with the ~4 cm-1 Fe3+ Zeeman branching strongly biased toward higher energies due to 3d-4f exchange. Magnons at ωAFM ~31.5 cm-1 and ωFM ~21.5 cm-1 in ErFeO3 do not undergo field induced band splits but a 13-fold increase in the antiferro (ωAMF) /ferro(ωAFM) intensity ratio. There is a remarkable field-dependent CF matching population balance between Fe3+ higher and Er3+ lower Zeeman branches. The Er3+ (4I15/2) multiplet, at the 49.5 cm-1, 110.5 cm-1, and 167.3 cm-1, coincides with external lattice mode frequencies suggesting strong lattice driven spin-phonon interactions. Far infrared absorption ratios under mild external fields reveal magnetic dependence only for those zone center phonons involving moving magnetic ions. Antiferro- and ferro- resonances in PrFeO3 turn much broader as non-Kramers Pr3 introduces ligand changes at the A site leading into near degeneracy the antiferromagnetic mode and the lowest Pr3+ CF transition. They merge into a single broad mostly unresolved feature at 7 T. We conclude that low energy excitations in RFeO3 (R=rare earth) strongly depend on the lanthanide ionic size thus indivisibly tied to the mechanism associated to the origin of canted ferromagnetism. In addition, minute lattice displacements also underlie considering noncentrosymmetric the most distorted RFeO3 (R=rare earth). In these perovskites the changes triggered in the lattice by the smaller rare earth and the nonlinear intrinsic oxygen ion polarizability, known to drive lattice instabilities, provide grounds for interplay of ionic and electronic interactions yielding ferroelectric spontaneous polarization.
Fil: Massa, Nestor Emilio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Química Inorgánica "Dr. Pedro J. Aymonino". Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Centro de Química Inorgánica "Dr. Pedro J. Aymonino"; Argentina
Fil: Del Campo, Leire. Université d Orléans; Francia
Fil: Ta Phuoc, Vinh. Universite de Tours; Francia
Fil: Kayser, Paula. University of Edinburgh; Reino Unido
Fil: Alonso, José Antonio. Instituto de Ciencia de Materiales de Madrid; España. Consejo Superior de Investigaciones Científicas; España
description We report on zone center THz excitations of non--Jahn Teller LaFeO3, PrFeO3, ErFeO3, and LuFeO3 distorted perovskites under external magnetic fields up 7 T. Our measurements on low temperature-low energy absorptions of LaFeO3 show antiferromagnetic and ferromagnetic magnons at ωAFM~31.4 and ωFM ~26.7 cm-1 in the Γ4 (Gx, Ay, Fz) representation with degeneracy near linearly lifted by the field. LuFeO3 is characterized by zero field magnetic resonances at ωAFM ~26.3 cm-1 and ωFM ~22.4 cm-1 in addition to Fe3+ Zeeman -split crystal field (CF) 6A1 ground transitions at ~10.4 cm-1 triggered by subtle structural deviations induced by the Lu 4f14 smaller ionic radius at the A site. This local quasi-non-centrosymmetric departure is also found in ErFeO3 (Kramers 4f11 Er3+ (4I15/2); Γ2 (Fx, Cy, Gz) <TSR ~93 K), but with the ~4 cm-1 Fe3+ Zeeman branching strongly biased toward higher energies due to 3d-4f exchange. Magnons at ωAFM ~31.5 cm-1 and ωFM ~21.5 cm-1 in ErFeO3 do not undergo field induced band splits but a 13-fold increase in the antiferro (ωAMF) /ferro(ωAFM) intensity ratio. There is a remarkable field-dependent CF matching population balance between Fe3+ higher and Er3+ lower Zeeman branches. The Er3+ (4I15/2) multiplet, at the 49.5 cm-1, 110.5 cm-1, and 167.3 cm-1, coincides with external lattice mode frequencies suggesting strong lattice driven spin-phonon interactions. Far infrared absorption ratios under mild external fields reveal magnetic dependence only for those zone center phonons involving moving magnetic ions. Antiferro- and ferro- resonances in PrFeO3 turn much broader as non-Kramers Pr3 introduces ligand changes at the A site leading into near degeneracy the antiferromagnetic mode and the lowest Pr3+ CF transition. They merge into a single broad mostly unresolved feature at 7 T. We conclude that low energy excitations in RFeO3 (R=rare earth) strongly depend on the lanthanide ionic size thus indivisibly tied to the mechanism associated to the origin of canted ferromagnetism. In addition, minute lattice displacements also underlie considering noncentrosymmetric the most distorted RFeO3 (R=rare earth). In these perovskites the changes triggered in the lattice by the smaller rare earth and the nonlinear intrinsic oxygen ion polarizability, known to drive lattice instabilities, provide grounds for interplay of ionic and electronic interactions yielding ferroelectric spontaneous polarization.
publishDate 2023
dc.date.none.fl_str_mv 2023-02
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/227229
Massa, Nestor Emilio; Del Campo, Leire; Ta Phuoc, Vinh; Kayser, Paula; Alonso, José Antonio; Low-temperature terahertz spectroscopy of LaFeO3, PrFeO3, ErFeO3, and LuFeO3: Quasimagnon resonances and ground-state multiplet transitions; American Physical Society; Physical Review B; 108; 11; 2-2023; 1-70
2331-8422
2331-8422
CONICET Digital
CONICET
url http://hdl.handle.net/11336/227229
identifier_str_mv Massa, Nestor Emilio; Del Campo, Leire; Ta Phuoc, Vinh; Kayser, Paula; Alonso, José Antonio; Low-temperature terahertz spectroscopy of LaFeO3, PrFeO3, ErFeO3, and LuFeO3: Quasimagnon resonances and ground-state multiplet transitions; American Physical Society; Physical Review B; 108; 11; 2-2023; 1-70
2331-8422
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://arxiv.org/abs/2303.02786
info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevB.108.115116
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
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:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.070432

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