X-ray investigation of lateral hetero-structures of inversion domains in LiNbO3, KTiOPO4and KTiOAsO4

Lyford, T.; Collins, Stephen P.; Fewster, Paul F.; Thomas, P. A.

doi:10.1107/s2053273315001503

Cited by 2 publications

(1 citation statement)

References 29 publications

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“…In the present study we can safely use the kinematic theory of diffraction. On the other hand, in high-quality periodic structures the kinematic theory has been shown to be inappropriate and another formalism should be used (Lyford et al, 2015).…”

Section: Structural Model Of 180 Stripe Domainsmentioning

confidence: 99%

Diffuse X-ray scattering from 180° ferroelectric stripe domains: polarization-induced strain, period disorder and wall roughness

2016

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A key element in ferroic materials is the presence of walls separating domains with different orientations of the order parameter. It is demonstrated that 180 stripe domains in ferroelectric films give rise to very distinct features in their diffuse X-ray scattering (DXS) intensity distributions. A model is developed that allows the determination of not only the domain period but also the period disorder, the thickness and roughness of the domain walls, and the strain induced by the rotation of the polarization. As an example, the model is applied to ferroelectric/paraelectric superlattices. Temperature-dependent DXS measurements reveal that the polarization-induced strain decreases dramatically with increasing temperature and vanishes at the Curie temperature. The motion of ferroelectric domain walls appears to be a collective process that does not create any disorder in the domain period, whereas pinning by structural defects increases the wall roughness. This work will facilitate in situ quantitative studies of ferroic domains and domain wall dynamics under the application of external stimuli, including electric fields and temperature. We have grown tricolour PbTiO 3 /SrTiO 3 /PbZr 0.2 Ti 0.8 O 3 (PT/ STO/PZT) SLs on TiO 2 -terminated (001)-oriented STO substrates using pulsed laser deposition following a procedure research papers 846 A. Boulle et al. Diffuse X-ray scattering from ferroelectric stripe domains J. Appl. Cryst. (2016). 49, 845-855 APPENDIX B Lognormal, Lévy-stable and pseudo-Voigt distributions A lognormal distribution is used to model the p.d.f. of the stripe period: research papers J. Appl. Cryst. (2016). 49, 845-855 A. Boulle et al. Diffuse X-ray scattering from ferroelectric stripe domains 853

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Section: Structural Model Of 180 Stripe Domainsmentioning

confidence: 99%

Diffuse X-ray scattering from 180° ferroelectric stripe domains: polarization-induced strain, period disorder and wall roughness

2016

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Identification of inversion domains in KTiOPO₄viaresonant X-ray diffraction

et al. 2015

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A novel method is presented for the identification of the absolute crystallographic structure in multi-domain polar materials such as ferroelectric KTiOPO 4 . Resonant (or 'anomalous') X-ray diffraction spectra collected across the absorption K edge of Ti (4.966 keV) on a single Bragg reflection demonstrate a huge intensity ratio above and below the edge, providing a polar domain contrast of $270. This allows one to map the spatial domain distribution in a periodically inverted sample, with a resolution of $1 mm achieved with a microfocused beam. This non-contact, non-destructive technique is well suited for samples of large dimensions (in contrast with traditional resonant X-ray methods based on diffraction from Friedel pairs), and its potential is particularly relevant in the context of physical phenomena connected with an absence of inversion symmetry, which require characterization of the underlying absolute atomic structure (such as in the case of magnetoelectric coupling and multiferroics).

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X-ray investigation of lateral hetero-structures of inversion domains in LiNbO₃, KTiOPO₄and KTiOAsO₄

Cited by 2 publications

References 29 publications

Diffuse X-ray scattering from 180° ferroelectric stripe domains: polarization-induced strain, period disorder and wall roughness

Diffuse X-ray scattering from 180° ferroelectric stripe domains: polarization-induced strain, period disorder and wall roughness

Identification of inversion domains in KTiOPO₄viaresonant X-ray diffraction

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X-ray investigation of lateral hetero-structures of inversion domains in LiNbO3, KTiOPO4and KTiOAsO4

Cited by 2 publications

References 29 publications

Diffuse X-ray scattering from 180° ferroelectric stripe domains: polarization-induced strain, period disorder and wall roughness

Diffuse X-ray scattering from 180° ferroelectric stripe domains: polarization-induced strain, period disorder and wall roughness

Identification of inversion domains in KTiOPO4viaresonant X-ray diffraction

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X-ray investigation of lateral hetero-structures of inversion domains in LiNbO₃, KTiOPO₄and KTiOAsO₄

Identification of inversion domains in KTiOPO₄viaresonant X-ray diffraction