Strain generated by the stacking faults in epitaxial SrO(SrTiO 3 ) N Ruddlesden–Popper structures - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue (Data Paper) Journal of Applied Crystallography Année : 2023

Strain generated by the stacking faults in epitaxial SrO(SrTiO 3 ) N Ruddlesden–Popper structures

Résumé

Ruddlesden–Popper (RP) phases present outstanding physical properties triggering significant academic interest. Out-of-plane stacking faults (OP-SFs), which are the main channel for accommodating stoichiometry imbalance in RP thin layers, affect these properties. The mechanisms underlying the formation and spatial distribution of these defects remain largely unknown to date. This work shows that the residual mismatch related to the presence of OP-SFs in SrTiO 3 -based RP thin layers is accommodated by a delocalized mechanism of lateral strain transfer from the disturbed regions to the RP structure, generating a distribution of compressive strain in the latter. Analysing the RP X-ray diffractograms in the light of this mechanism allows the assessment of the OP-SF distribution along the growth axis. It also allows the separate and accurate determination of the SrTiO 3 lattice parameter ( c = 3.9214 ± 0.0003 Å) and the SrO–SrO inter-reticular distance ( d = 2.549 ± 0.001 Å) in the RP structure.
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Dates et versions

hal-04220588 , version 1 (28-09-2023)

Identifiants

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Guillaume Saint-Girons, Clarisse Furgeaud, Ludovic Largeau, Alexandre Danescu, Romain Bachelet, et al.. Strain generated by the stacking faults in epitaxial SrO(SrTiO 3 ) N Ruddlesden–Popper structures. Journal of Applied Crystallography, 2023, 56 (5), pp.1426-1434. ⟨10.1107/s1600576723006945⟩. ⟨hal-04220588⟩
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