Anomalous thermal conductivity of alkaline-earth-metal-substituted EuTiO3 induced by resonant scattering
Autor(a) principal: | |
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Data de Publicação: | 2023 |
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/10773/37922 |
Resumo: | We have investigated thermal conductivities (κ) of polycrystalline Eu1–xAxTiO3 (A = Ca, Sr, Ba, 0 ≤ x ≤ 0.8) bulk materials in the temperature range of ∼ 2 K < T < 1173 K. The EuTiO3 demonstrates anomalous glass-like κ(T) behavior at low temperatures. Partial substitutions with Sr2+ and Ba2+ do not cause a significant change in the κ(T) behavior, while a κ(T) peak, which looks like a manifestation of a typical crystalline solid, appears only in the Ca-substituted samples with an orthorhombic structure when x ≥ 0.4. After excluding the magnetic effects on κ and discussing the possible phonon scattering mechanisms in depth, together with heat capacity Cp measurements and high-resolution X-Ray diffraction characterization, we find that the unusual low κ at low temperatures is attributed to resonant scattering induced by the intrinsic disordered local structure and lattice instability in EuTiO3. Due to the different lattice dynamics of ATiO3, the lattice structure of Eu1–xCaxTiO3 can be regarded as formed by a part-soft (from EuTiO3) part-rigid (from CaTiO3) sublattice. The anomalous κ(T) behavior of Eu1–xCaxTiO3 results from the combined effect of phonon transport between the normal phononic heat transport in the rigid sublattice and the strong damping of heat conduction in the soft sublattice. |
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7160 |
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Anomalous thermal conductivity of alkaline-earth-metal-substituted EuTiO3 induced by resonant scatteringWe have investigated thermal conductivities (κ) of polycrystalline Eu1–xAxTiO3 (A = Ca, Sr, Ba, 0 ≤ x ≤ 0.8) bulk materials in the temperature range of ∼ 2 K < T < 1173 K. The EuTiO3 demonstrates anomalous glass-like κ(T) behavior at low temperatures. Partial substitutions with Sr2+ and Ba2+ do not cause a significant change in the κ(T) behavior, while a κ(T) peak, which looks like a manifestation of a typical crystalline solid, appears only in the Ca-substituted samples with an orthorhombic structure when x ≥ 0.4. After excluding the magnetic effects on κ and discussing the possible phonon scattering mechanisms in depth, together with heat capacity Cp measurements and high-resolution X-Ray diffraction characterization, we find that the unusual low κ at low temperatures is attributed to resonant scattering induced by the intrinsic disordered local structure and lattice instability in EuTiO3. Due to the different lattice dynamics of ATiO3, the lattice structure of Eu1–xCaxTiO3 can be regarded as formed by a part-soft (from EuTiO3) part-rigid (from CaTiO3) sublattice. The anomalous κ(T) behavior of Eu1–xCaxTiO3 results from the combined effect of phonon transport between the normal phononic heat transport in the rigid sublattice and the strong damping of heat conduction in the soft sublattice.Elsevier2025-05-29T00:00:00Z2023-05-29T00:00:00Z2023-05-29info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10773/37922eng10.1016/j.mtphys.2023.101132Xiao, XingxingXie, WenjiePhilippi, KaiLiu, YameiSkokov, KonstantinRadulov, Iliya AngelovWidenmeyer, MarcKovalevsky, AndreiShen, ChenZhang, HongbinChecchia, StefanoScavini, MarcoHe, JianWeidenkaff, Ankeinfo:eu-repo/semantics/embargoedAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2024-02-22T12:14:03Zoai:ria.ua.pt:10773/37922Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T03:08:30.868571Repositório 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 |
Anomalous thermal conductivity of alkaline-earth-metal-substituted EuTiO3 induced by resonant scattering |
title |
Anomalous thermal conductivity of alkaline-earth-metal-substituted EuTiO3 induced by resonant scattering |
spellingShingle |
Anomalous thermal conductivity of alkaline-earth-metal-substituted EuTiO3 induced by resonant scattering Xiao, Xingxing |
title_short |
Anomalous thermal conductivity of alkaline-earth-metal-substituted EuTiO3 induced by resonant scattering |
title_full |
Anomalous thermal conductivity of alkaline-earth-metal-substituted EuTiO3 induced by resonant scattering |
title_fullStr |
Anomalous thermal conductivity of alkaline-earth-metal-substituted EuTiO3 induced by resonant scattering |
title_full_unstemmed |
Anomalous thermal conductivity of alkaline-earth-metal-substituted EuTiO3 induced by resonant scattering |
title_sort |
Anomalous thermal conductivity of alkaline-earth-metal-substituted EuTiO3 induced by resonant scattering |
author |
Xiao, Xingxing |
author_facet |
Xiao, Xingxing Xie, Wenjie Philippi, Kai Liu, Yamei Skokov, Konstantin Radulov, Iliya Angelov Widenmeyer, Marc Kovalevsky, Andrei Shen, Chen Zhang, Hongbin Checchia, Stefano Scavini, Marco He, Jian Weidenkaff, Anke |
author_role |
author |
author2 |
Xie, Wenjie Philippi, Kai Liu, Yamei Skokov, Konstantin Radulov, Iliya Angelov Widenmeyer, Marc Kovalevsky, Andrei Shen, Chen Zhang, Hongbin Checchia, Stefano Scavini, Marco He, Jian Weidenkaff, Anke |
author2_role |
author author author author author author author author author author author author author |
dc.contributor.author.fl_str_mv |
Xiao, Xingxing Xie, Wenjie Philippi, Kai Liu, Yamei Skokov, Konstantin Radulov, Iliya Angelov Widenmeyer, Marc Kovalevsky, Andrei Shen, Chen Zhang, Hongbin Checchia, Stefano Scavini, Marco He, Jian Weidenkaff, Anke |
description |
We have investigated thermal conductivities (κ) of polycrystalline Eu1–xAxTiO3 (A = Ca, Sr, Ba, 0 ≤ x ≤ 0.8) bulk materials in the temperature range of ∼ 2 K < T < 1173 K. The EuTiO3 demonstrates anomalous glass-like κ(T) behavior at low temperatures. Partial substitutions with Sr2+ and Ba2+ do not cause a significant change in the κ(T) behavior, while a κ(T) peak, which looks like a manifestation of a typical crystalline solid, appears only in the Ca-substituted samples with an orthorhombic structure when x ≥ 0.4. After excluding the magnetic effects on κ and discussing the possible phonon scattering mechanisms in depth, together with heat capacity Cp measurements and high-resolution X-Ray diffraction characterization, we find that the unusual low κ at low temperatures is attributed to resonant scattering induced by the intrinsic disordered local structure and lattice instability in EuTiO3. Due to the different lattice dynamics of ATiO3, the lattice structure of Eu1–xCaxTiO3 can be regarded as formed by a part-soft (from EuTiO3) part-rigid (from CaTiO3) sublattice. The anomalous κ(T) behavior of Eu1–xCaxTiO3 results from the combined effect of phonon transport between the normal phononic heat transport in the rigid sublattice and the strong damping of heat conduction in the soft sublattice. |
publishDate |
2023 |
dc.date.none.fl_str_mv |
2023-05-29T00:00:00Z 2023-05-29 2025-05-29T00:00:00Z |
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/10773/37922 |
url |
http://hdl.handle.net/10773/37922 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1016/j.mtphys.2023.101132 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/embargoedAccess |
eu_rights_str_mv |
embargoedAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Elsevier |
publisher.none.fl_str_mv |
Elsevier |
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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1799137737604857856 |