Transmission electron microscopy on nickel oxide single crystals deformed at room temperature

Maruyama, Satofumi; Gervais, A.; Philibert, J.

doi:10.1007/bf00543748

Cited by 7 publications

(4 citation statements)

References 13 publications

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“…This is consistent with the existence of numerous dislocation reactions which have been observed in T.E.M. studies [7,8]. Because of the high plastic anisotropy the product dislocations cannot move at T 500-600 OC (Fig.…”

Section: Tests)supporting

confidence: 77%

“…There are a few transmission electron microscopy observations of NiO which give a few insights on its plastic deformation [7,8]. Fuertes [8] found 6f values different from those previously published [3], in particular at T = 773 K; this was tentatively attributed to differences in point defect configurations [8] ; our new data are closer to those of Fuertes [8] than the previous ones [3].…”

Section: Introductioncontrasting

confidence: 39%

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Plastic deformation of bunsenite (NiO) at temperatures below 1 050 °C

Guiberteau

Donminguez-Rodriguez

Spendel

et al. 1986

Rev. Phys. Appl. (Paris)

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Section: Tests)supporting

confidence: 77%

Section: Introductioncontrasting

confidence: 39%

Plastic deformation of bunsenite (NiO) at temperatures below 1 050 °C

Guiberteau

Donminguez-Rodriguez

Spendel

et al. 1986

Rev. Phys. Appl. (Paris)

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“…Due to the (001) epitaxial relation, the Burgers vector’s projection along [001] zone axis is determined to be b ′ = a /2[010] (Figure A) with an insertion of a half (200) plane of atoms. Together with an invisible screw dislocation with b ′ = a /2[001] along [001] zone axis, the total Burgers vector of this mixed dislocation is determined to be b = a /2⟨110⟩ as expected for nickle oxide . Based on the combination of the real space and the Fourier space information, the dislocation phase field can be acquired from the local Fourier components of the image .…”

Section: Resultsmentioning

confidence: 99%

Atomistic Defect Makes a Phase Plate for the Generation and High-Angular Splitting of Electron Vortex Beams

et al. 2019

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Topological defects in solid-state materials by breaking the translational symmetry offer emerging properties that are not present in their parental phases. For example, edge dislocationsthe 2π phase-winding topological defectsin antiferromagnetic NiO crystals can exhibit ferromagnetic behaviors. Herein, we study how these defects could give rise to topological orders when they interact with a high-energy electron beam. To probe this interaction, we formed a coherent electron nanobeam in a scanning transmission electron microscope and recorded the far-field transmitted patterns as the beam steps through the edge dislocation core in [001] NiO. Surprisingly, we found the amplitude patterns of the ⟨020⟩ Bragg disks evolve in a similar manner to the evolution of an annular solar eclipse. Using the ptychographic technique, we recovered the missing phase information in the diffraction plane and revealed the topological phase vortices in the diffracted beams. Through atomic topological defects, the wave function of electrons can be converted from plane wave to electron vortex. Technologically, this approach provides a feasible route for the fabrication of phase plates that can generate electron vortex beams with an angular separation that is 3 orders of magnitude larger than what traditional nanofabrication technology can offer. This advance will enable the collection of magnetic circular dichroism spectra with high spatial resolution and high efficiency, boosting the understanding of the relationship between symmetry breaking and magnetic property of individual topological defect at the atomic scale.

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“…The order-disorder transformation is similar to that in FeAl alloys, which was demonstrated by Pochet et al [9], whose experimental observation and theoretical prediction suggested that such a transformation can be ascribed to the competition between thermal diffusion and mechanically induced shearing and glides [11]. Although extensive shear-induced glides may not commonly occur in bulk oxides, they have been observed in perovskite structures at elevated temperatures, and in particular in some nanocrystalline oxides, which exhibit a considerable degree of superplasticity and glide-induced behaviours [24][25][26]. Furthermore, the in situ temperature at the collision point can be very high [3].…”

Section: Introductionmentioning

confidence: 93%

A Monte Carlo simulation of B-site order disorder transformation in Pb(Sc_1/2Ta_1/2)O₃triggered by mechanical activation

Gao

Lim

Xue

et al. 2002

J. Phys.: Condens. Matter

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Order–disorder transformation triggered by mechanical activation in a perovskite structure was observed in Pb(Sc1/2Ta1/2)O3; it is simulated using a Monte Carlo algorithm, based on the competition between mechanical activation leading to disordering and the thermal diffusion recovering the ordering. The time evolution of the long-range order (LRO) from an initial ordered state shows a steady decrease at the initial stage and then becomes more or less stabilized over a prolonged period; while from the disordered initial state, LRO increases first and then stabilizes at a similar end value. Thermal diffusion is the dominant process at relatively high temperatures, leading to the disorder-to-order transformation. The effect of mechanical activation becomes significant and results in order-to-disorder transformation at relatively low temperatures. Both the mechanical activation intensity and the vacancy migration energy exert an impact on the degree of ordering and the order–disorder transformation temperature at low temperatures. Snapshot images of the simulation demonstrate the competition between thermal diffusion and mechanical activation, which refines the domain size.

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Transmission electron microscopy on nickel oxide single crystals deformed at room temperature

Cited by 7 publications

References 13 publications

Plastic deformation of bunsenite (NiO) at temperatures below 1 050 °C

Plastic deformation of bunsenite (NiO) at temperatures below 1 050 °C

Atomistic Defect Makes a Phase Plate for the Generation and High-Angular Splitting of Electron Vortex Beams

A Monte Carlo simulation of B-site order disorder transformation in Pb(Sc_1/2Ta_1/2)O₃triggered by mechanical activation

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Transmission electron microscopy on nickel oxide single crystals deformed at room temperature

Cited by 7 publications

References 13 publications

Plastic deformation of bunsenite (NiO) at temperatures below 1 050 °C

Plastic deformation of bunsenite (NiO) at temperatures below 1 050 °C

Atomistic Defect Makes a Phase Plate for the Generation and High-Angular Splitting of Electron Vortex Beams

A Monte Carlo simulation of B-site order disorder transformation in Pb(Sc1/2Ta1/2)O3triggered by mechanical activation

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Product

Resources

About

A Monte Carlo simulation of B-site order disorder transformation in Pb(Sc_1/2Ta_1/2)O₃triggered by mechanical activation