Please use this identifier to cite or link to this item: http://hdl.handle.net/10773/37922
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dc.contributor.authorXiao, Xingxingpt_PT
dc.contributor.authorXie, Wenjiept_PT
dc.contributor.authorPhilippi, Kaipt_PT
dc.contributor.authorLiu, Yameipt_PT
dc.contributor.authorSkokov, Konstantinpt_PT
dc.contributor.authorRadulov, Iliya Angelovpt_PT
dc.contributor.authorWidenmeyer, Marcpt_PT
dc.contributor.authorKovalevsky, Andreipt_PT
dc.contributor.authorShen, Chenpt_PT
dc.contributor.authorZhang, Hongbinpt_PT
dc.contributor.authorChecchia, Stefanopt_PT
dc.contributor.authorScavini, Marcopt_PT
dc.contributor.authorHe, Jianpt_PT
dc.contributor.authorWeidenkaff, Ankept_PT
dc.date.accessioned2023-06-02T11:53:01Z-
dc.date.issued2023-05-29-
dc.identifier.urihttp://hdl.handle.net/10773/37922-
dc.description.abstractWe 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.pt_PT
dc.language.isoengpt_PT
dc.publisherElsevierpt_PT
dc.relation57610929pt_PT
dc.relation40101580pt_PT
dc.relationinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F50011%2F2020/PTpt_PT
dc.relationinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDP%2F50011%2F2020/PTpt_PT
dc.relationLA/P/0006/2020pt_PT
dc.rightsembargoedAccesspt_PT
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/pt_PT
dc.titleAnomalous thermal conductivity of alkaline-earth-metal-substituted EuTiO3 induced by resonant scatteringpt_PT
dc.typearticlept_PT
dc.description.versionpublishedpt_PT
dc.peerreviewedyespt_PT
degois.publication.titleMaterials Today Physicspt_PT
dc.date.embargo2025-05-29-
dc.identifier.doi10.1016/j.mtphys.2023.101132pt_PT
dc.identifier.essn2542-5293pt_PT
dc.identifier.articlenumber101132pt_PT
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