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http://hdl.handle.net/10773/36540
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DC Field | Value | Language |
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dc.contributor.author | Salak, A.N. | pt_PT |
dc.contributor.author | Cardoso, J.P. | pt_PT |
dc.contributor.author | Khalyavin, D.D. | pt_PT |
dc.contributor.author | Barbier, A. | pt_PT |
dc.contributor.author | Fertey, P. | pt_PT |
dc.contributor.author | Mikhalev, S.M. | pt_PT |
dc.contributor.author | Olekhnovich, N.M. | pt_PT |
dc.contributor.author | Pushkarev, A.V. | pt_PT |
dc.contributor.author | Radyush, Yu V. | pt_PT |
dc.contributor.author | Stanulis, A. | pt_PT |
dc.contributor.author | Ramanauskas, R. | pt_PT |
dc.date.accessioned | 2023-03-09T16:12:11Z | - |
dc.date.available | 2023-03-09T16:12:11Z | - |
dc.date.issued | 2023-02-25 | - |
dc.identifier.issn | 0022-4596 | pt_PT |
dc.identifier.uri | http://hdl.handle.net/10773/36540 | - |
dc.description.abstract | Crystal structures of the high-pressure synthesized perovskite phases of the (1-x)BiFe0.5Sc0.5O3-xLaFe0.5Sc0.5O3 (0 = x ≤ 1) system and their temperature and pressure behaviours were studied using laboratory and synchrotron X-ray diffractions as well as neutron diffraction. At room temperature, the as-prepared phases with x ≤ 0.05 have an antipolar structure with the Pnma symmetry and with the √2ap × 4ap × 2√2ap superstructure (where ap is the pseudocubic perovskite unit-cell parameter). An incommensurately modulated phase with the Imma(00γ)s00 superspace group is observed for 0.10 = x ≤ 0.33, while a non-polar Pnma phase (√2ap × 2ap × √2ap) is stable when x ≥ 0.34. The antipolar Pnma phase in the as-prepared samples with composition corresponding to x = 0 transforms into the polar Ima2 one via irreversible annealing-caused transformation accompanied by a formation of a high-temperature intermediate polar R3c polymorph, while the antipolar Pnma phase in samples with x = 0.05 is stable until the decomposition temperature. In the solid solutions with 0.10 = x ≤ 0.33, increasing temperature was found to result in a reversible transformation of the Imma(00γ)s00 phase into a non-polar Pnma one. The transition temperature decreases with increasing x. A hydrostatic pressure of few GPa was also shown to induce a reversible Imma(00γ)s00 → Pnma transformation. | pt_PT |
dc.language.iso | eng | pt_PT |
dc.publisher | Elsevier | pt_PT |
dc.relation | info:eu-repo/grantAgreement/FCT/POR_CENTRO/SFRH%2FBD%2F145281%2F2019/PT | pt_PT |
dc.relation | info:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F50011%2F2020/PT | pt_PT |
dc.relation | info:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDP%2F50011%2F2020/PT | pt_PT |
dc.relation | LA/P/0006/2020 | pt_PT |
dc.rights | openAccess | pt_PT |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/4.0/ | pt_PT |
dc.subject | High-pressure synthesis | pt_PT |
dc.subject | Metastable perovskite phase | pt_PT |
dc.subject | Incommensurate modulation | pt_PT |
dc.title | Composition-, temperature- and pressure-induced transitions between high-pressure stabilized perovskite phases of the (1-x)BiFe0.5Sc0.5O3 - xLaFe0.5Sc0.5O3 series | pt_PT |
dc.type | article | pt_PT |
dc.description.version | published | pt_PT |
dc.peerreviewed | yes | pt_PT |
degois.publication.title | Journal of Solid State Chemistry | pt_PT |
degois.publication.volume | 322 | pt_PT |
dc.identifier.doi | 10.1016/j.jssc.2023.123937 | pt_PT |
dc.identifier.essn | 1095-726X | pt_PT |
dc.identifier.articlenumber | 123937 | pt_PT |
Appears in Collections: | CICECO - Artigos |
Files in This Item:
File | Description | Size | Format | |
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jssc322_123937.pdf | 1.1 MB | Adobe PDF | View/Open |
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