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Picometer-Precision Atomic Position Tracking through Electron Microscopy

Picometer-Precision Atomic Position Tracking through Electron Microscopy

Published on: July 3, 2021

Mapping 180° polar domains using electron backscatter diffraction and dynamical scattering simulations.

Matthew J Burch¹, Chris M Fancher¹, Srikanth Patala¹

¹Department of Materials Science and Engineering, North Carolina State University, Raleigh, NC, USA.

Ultramicroscopy

|December 2, 2016

Summary

This summary is machine-generated.

A new electron backscatter diffraction (EBSD) method non-destructively maps polar domains by determining crystal orientation. This technique successfully mapped ferroelectric domains in lithium niobate crystals.

Keywords:

EBSD Electron backscatter diffraction Ferroelectric Ferroelectric domain

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Area of Science:

Materials Science
Crystallography
Solid-State Physics

Background:

Determining the absolute orientation of polar domains in non-centrosymmetric crystals is crucial for understanding material properties.
Existing methods for mapping polar domains can be destructive or lack precision.

Purpose of the Study:

To introduce and demonstrate a novel, non-destructive technique for mapping polar domains using electron backscatter diffraction (EBSD).
To determine the absolute orientation of polar domains in crystalline materials.

Main Methods:

Utilizing dynamical diffraction simulations to analyze experimental EBSD patterns.
Quantitatively comparing simulation results with experimental data to ascertain crystal orientation.
Applying the technique to map ferroelectric domains in lithium niobate (LiNbO3) single crystals.

Main Results:

The study successfully determined the absolute orientation of polar domains.
The novel EBSD technique was demonstrated to be effective in mapping 180° ferroelectric domains in periodically poled LiNbO3.
The applicability of the method to other polar material systems was shown.

Conclusions:

The developed EBSD technique offers a direct and non-destructive approach to mapping polar domains.
This method provides a reliable way to determine absolute crystal orientation, essential for materials with polar properties.
The technique holds promise for characterizing various polar materials beyond lithium niobate.