Correlative chemical and structural nanocharacterization of a pseudo‐binary 0.75Bi(Fe0.97Ti0.03)O3‐0.25BaTiO3 ceramic

McCartan, Shane J.; Calisir, Ilkan; Paterson, Gary W.; Webster, Robert W. H.; Macgregor, Thomas A.; Hall, David A.; MacLaren, Ian

doi:10.1111/jace.17599

Cited by 10 publications

(6 citation statements)

References 49 publications

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“…12,13 Similar approaches have also been used in the BF-BT system by introducing various dopants, such as Sr 2+ , La 3+ , Mn 4+ , Ti 4+ , Nb 5+ . 8,[14][15][16][17] However, few reports have investigated the simultaneous control of resistivity and piezoelectric properties of BF-BT in response to donor substitution. As noted above, the resistivity can be improved by substituting donortype Nb 5+ cations for Fe 3+ or Ti 4+ , but high Nb concentrations tend to suppress long-range ferroelectric ordering and induce ergodic relaxor ferroelectric behaviour.…”

Section: Introductionmentioning

confidence: 99%

Re-entrant relaxor ferroelectric behaviour in Nb-doped BiFeO₃–BaTiO₃ ceramics

et al. 2023

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Section: Introductionmentioning

confidence: 99%

Re-entrant relaxor ferroelectric behaviour in Nb-doped BiFeO₃–BaTiO₃ ceramics

et al. 2023

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“…Data were recorded using a Quantum Detectors MerlinEM direct electron detector, as detailed and used in our previous publications. 18,23 A precession angle of 0.5 • was used and the probe size was estimated at a diameter of 2.5-3 nm based on previous measurements for this condenser aperture; a 3 nm step size was used in data acquisition. The raw data were exported from the .app5 file format used by TopSpin to an hdf5 file using a suitable function in the fpd python library 24 (https:// fpdpy.gitlab.io/fpd/).…”

Section: Methodsmentioning

confidence: 99%

A method for crystallographic mapping of an alpha‐beta titanium alloy with nanometre resolution using scanning precession electron diffraction and open‐source software libraries

MacLaren,

Frutos‐Myro,

Zeltmann

et al. 2024

Journal of Microscopy

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An approach for the crystallographic mapping of two‐phase alloys on the nanoscale using a combination of scanned precession electron diffraction and open‐source python libraries is introduced in this paper. This method is demonstrated using the example of a two‐phase α/β titanium alloy. The data were recorded using a direct electron detector to collect the patterns, and recently developed algorithms to perform automated indexing and analyse the crystallography from the results. Very high‐quality mapping is achieved at a 3 nm step size. The results show the expected Burgers orientation relationships between the α laths and β matrix, as well as the expected misorientations between α laths. A minor issue was found that one area was affected by 180° ambiguities in indexing occur due to this area being aligned too close to a zone axis of the α with twofold projection symmetry (not present in 3D) in the zero‐order Laue Zone, and this should be avoided in data acquisition in the future. Nevertheless, this study demonstrates a good workflow for the analysis of nanocrystalline two‐ or multi‐phase materials, which will be of widespread use in analysing two‐phase titanium and other systems and how they evolve as a function of thermomechanical treatments.

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“…This 4D-STEM data analysis method based on the ACOM system of NanoMegas (Astar) 22 – 25 uses pattern matching of a scanning nano-diffraction dataset with libraries of diffraction patterns simulated from known structures extracted from CIF files. This method enables to construct of crystalline phase and orientation maps to determine crystallinity 26 , 27 , microstructures 28 , structural deformation 29 , and grain boundaries 30 using scanning nano-diffraction with precession mode in a nanometer resolution 31 – 33 .…”

Section: Introductionmentioning

confidence: 99%

Improved ACOM pattern matching in 4D-STEM through adaptive sub-pixel peak detection and image reconstruction

Folastre,

Cao,

Oney

et al. 2024

Sci Rep

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The technique known as 4D-STEM has recently emerged as a powerful tool for the local characterization of crystalline structures in materials, such as cathode materials for Li-ion batteries or perovskite materials for photovoltaics. However, the use of new detectors optimized for electron diffraction patterns and other advanced techniques requires constant adaptation of methodologies to address the challenges associated with crystalline materials. In this study, we present a novel image-processing method to improve pattern matching in the determination of crystalline orientations and phases. Our approach uses sub-pixel adaptive image processing to register and reconstruct electron diffraction signals in large 4D-STEM datasets. By using adaptive prominence and linear filters, we can improve the quality of the diffraction pattern registration. The resulting data compression rate of 103 is well-suited for the era of big data and provides a significant enhancement in the performance of the entire ACOM data processing method. Our approach is evaluated using dedicated metrics, which demonstrate a high improvement in phase recognition. Several features are extracted from the registered data to map properties such as the spot count, and various virtual dark fields, which are used to enhance the handling of the results maps. Our results demonstrate that this data preparation method not only enhances the quality of the resulting image but also boosts the confidence level in the analysis of the outcomes related to determining crystal orientation and phase. Additionally, it mitigates the impact of user bias that may occur during the application of the method through the manipulation of parameters.

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Correlative chemical and structural nanocharacterization of a pseudo‐binary 0.75Bi(Fe_0.97Ti_0.03)O₃‐0.25BaTiO₃ ceramic

Abstract: Article type : Article Correlative chemical and structural nanocharacterization of a pseudo-binary 0.75Bi(Fe 0.97 Ti 0.03)O 3-0.25BaTiO 3 ceramic

Cited by 10 publications

References 49 publications

Re-entrant relaxor ferroelectric behaviour in Nb-doped BiFeO₃–BaTiO₃ ceramics

Re-entrant relaxor ferroelectric behaviour in Nb-doped BiFeO₃–BaTiO₃ ceramics

A method for crystallographic mapping of an alpha‐beta titanium alloy with nanometre resolution using scanning precession electron diffraction and open‐source software libraries

Improved ACOM pattern matching in 4D-STEM through adaptive sub-pixel peak detection and image reconstruction

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Correlative chemical and structural nanocharacterization of a pseudo‐binary 0.75Bi(Fe0.97Ti0.03)O3‐0.25BaTiO3 ceramic

Abstract: Article type : Article Correlative chemical and structural nanocharacterization of a pseudo-binary 0.75Bi(Fe 0.97 Ti 0.03)O 3-0.25BaTiO 3 ceramic

Cited by 10 publications

References 49 publications

Re-entrant relaxor ferroelectric behaviour in Nb-doped BiFeO3–BaTiO3 ceramics

Re-entrant relaxor ferroelectric behaviour in Nb-doped BiFeO3–BaTiO3 ceramics

A method for crystallographic mapping of an alpha‐beta titanium alloy with nanometre resolution using scanning precession electron diffraction and open‐source software libraries

Improved ACOM pattern matching in 4D-STEM through adaptive sub-pixel peak detection and image reconstruction

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Correlative chemical and structural nanocharacterization of a pseudo‐binary 0.75Bi(Fe_0.97Ti_0.03)O₃‐0.25BaTiO₃ ceramic

Re-entrant relaxor ferroelectric behaviour in Nb-doped BiFeO₃–BaTiO₃ ceramics

Re-entrant relaxor ferroelectric behaviour in Nb-doped BiFeO₃–BaTiO₃ ceramics