Temperature dependence of three-dimensional domain wall arrangement in ferroelectric K0.9Na0.1NbO3 epitaxial thin films

Schmidbauer, M.; Bogula, Laura; Wang, Bo; Hanke, M.; Helden, Leonard von; Ladera, Adriana; Wang, Jianjun; Chen, Lei; Schwarzkopf, Jutta

doi:10.1063/5.0029167

Cited by 13 publications

(3 citation statements)

References 45 publications

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“…Typically, such patterns are characterized using synchrotron-based 3D-RSM. [17][18][19] When we rotate the sample ϕ = 45 ○ away from the NSO[-110] direction, we can still observe off Bragg scattering peaks from the domains. However, they appear at different positions, clearly indicating that at this rotation angle, they do not originate from scattering in the diffraction plane.…”

Section: Articlementioning

confidence: 99%

Reciprocal space x-ray computed tomography

Vailionis,

Wu,

Spanier

2024

APL Materials

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Three-dimensional reciprocal space mapping (3D-RSM) offers crucial insights into the intricate microstructural properties of materials, including spatial domain distribution, directional long-range ordering, multilayer-substrate mismatch, layer tilting, and defect structure. Traditionally, 3D-RSMs are conducted at synchrotron facilities where instrumental resolution is constrained in all three directions. Lab-based sources have often been considered suboptimal for 3D-RSM measurements due to poor instrumental resolution along the axial direction. However, we demonstrate that, by employing three-dimensional reciprocal space x-ray computed tomography (RS-XCT), the same perceived limitation in resolution can be effectively leveraged to acquire high quality 3D-RSMs. Through a combination of ultrafast reciprocal space mapping and computed tomography reconstruction routines, lab-based 3D-RSMs achieve resolutions comparable to those obtained with synchrotron-based techniques. RS-XCT introduces a practical modality for lab-based x-ray diffractometers, enabling high-resolution 3D-RSM measurements on a variety of materials exhibiting complex three-dimensional scattering landscapes in reciprocal space.

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Section: Articlementioning

confidence: 99%

Reciprocal space x-ray computed tomography

Vailionis,

Wu,

Spanier

2024

APL Materials

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“…It is mainly because the distribution of X-ray diffraction intensity from a multi-domain crystal may be as complex as the domain patterns themselves. Up until now, single-crystal X-ray diffraction was successfully applied for characterization of domains in epitaxial thin films (Ehara et al, 2017;Braun et al, 2018;von Helden et al, 2018;Lee et al, 2019Lee et al, , 2020Schmidbauer et al, 2020) where possible domain patterns are greatly limited by the constraints imposed by the substrate.…”

Section: Introductionmentioning

confidence: 99%

Identification of a coherent twin relationship from high-resolution reciprocal-space maps

Gorfman¹,

Spirito²,

Zhang³

et al. 2022

Acta Cryst Sect A

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Twinning is a common crystallographic phenomenon which is related to the formation and coexistence of several orientation variants of the same crystal structure. It may occur during symmetry-lowering phase transitions or during the crystal growth itself. Once formed, twin domains play an important role in defining physical properties: for example, they underpin the giant piezoelectric effect in ferroelectrics, superelasticity in ferroelastics and the shape-memory effect in martensitic alloys. Regrettably, there is still a lack of experimental methods for the characterization of twin domain patterns. Here, a theoretical framework and algorithm are presented for the recognition of ferroelastic domains, as well as the identification of the coherent twin relationship using high-resolution reciprocal-space mapping of X-ray diffraction intensity around split Bragg peaks. Specifically, the geometrical theory of twinned ferroelastic crystals [Fousek & Janovec (1969). J. Appl. Phys. 40, 135–142] is adapted for the analysis of the X-ray diffraction patterns. The necessary equations are derived and an algorithm is outlined for the calculation of the separation between the Bragg peaks, diffracted from possible coherent twin domains, connected to one another via a mismatch-free interface. It is demonstrated that such separation is always perpendicular to the planar interface between mechanically matched domains. For illustration purposes, the analysis is presented of the separation between the peaks diffracted from tetragonal and rhombohedral domains in the high-resolution reciprocal-space maps of BaTiO3 and PbZr1−x Ti x O3 crystals. The demonstrated method can be used to analyse the response of multi-domain patterns to external perturbations such as electric field, change of temperature or pressure.

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“…In fact, it has been shown that the domain wall orientation in the herringbone-like domains varies with respect to the chemical composition [46] . Despite these effort s, it is still challenging to realize and understand the three-dimensional arrangement of the superdomains solely from experimental characterization [47] . The configuration of ferroelectric polarization in the superdomains, particularly near the superdomain boundaries, is not well understood.…”

Section: Introductionmentioning

confidence: 99%