Surface Potential Investigation on Nano Domain Formation in Lithium Tantalate Single Crystal

AbstractThe surface potential distribution following polarization reversal by scanning probe microscopy is examined in order to determine the mechanism of anti-parallel polarization reversal and ring-shaped domain formation in single-crystal lithium tantalate. Lithium vacancy lattice defects are identified as charge-trapping sites, with the resultant surface potential distribution governing the formation of ring-shaped nano-domains. The behavior of this charge injection is shown to be dependent on atmospheric humidity.

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Nano-Domains Produced through a Two-Step Poling Technique in Lithium Niobate on Insulators

Materials ◽

10.3390/ma13163617 ◽

2020 ◽

Vol 13 (16) ◽

pp. 3617

Author(s):

Yuejian Jiao ◽

Zhen Shao ◽

Sanbing Li ◽

Xiaojie Wang ◽

Fang Bo ◽

...

Keyword(s):

Lithium Niobate ◽

High Voltage Pulse ◽

Ferroelectric Domain ◽

Polarization Reversal ◽

Poling Field ◽

Reversal Effect ◽

Atomic Force ◽

Parallel Polarization ◽

Shaped Domain ◽

Poling Technique

We proposed a two-step poling technique to fabricate nanoscale domains based on the anti-parallel polarization reversal effect in lithium niobate on insulator (LNOI). The anti-parallel polarization reversal is observed when lithium niobate thin film in LNOI is poled by applying a high voltage pulse through the conductive probe tip of atomic force microscope, which generates a donut-shaped domain structure with its domain polarization at the center being anti-parallel to the poling field. The donut-shaped domain is unstable and decays with a time scale of hours. With the two-step poling technique, the polarization of the donut-shaped domain can be reversed entirely, producing a stable dot domain with a size of tens of nanometers. Dot domains with diameter of the order of ∼30 nm were fabricated through the two-step poling technique. The results may be beneficial to domain-based applications such as ferroelectric domain memory.

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Surface Potential Distribution in an Indentation- Pre-Cracked BaTiO3 Single Crystal

Journal of the American Ceramic Society ◽

10.1111/j.1551-2916.2011.04634.x ◽

2011 ◽

Vol 94 (12) ◽

pp. 4299-4304 ◽

Cited By ~ 5

Author(s):

X. Sun ◽

Y. J. Su ◽

K. W. Gao ◽

L. Q. Guo ◽

L. J. Qiao ◽

...

Keyword(s):

Single Crystal ◽

Surface Potential ◽

Potential Distribution

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The effects of surface absorbed monolayer microdiffraction patterns

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100105461 ◽

1988 ◽

Vol 46 ◽

pp. 680-681

Author(s):

M. Pan ◽

J.M. Cowley

Keyword(s):

Surface Potential ◽

Electron Probe ◽

Potential Distribution ◽

Crystal Surface ◽

Normal Direction ◽

Surface Image ◽

Extended Surface ◽

Gas Molecules ◽

Surface Nature ◽

Electron Microdiffraction

Electron microdiffraction patterns, obtained when a small electron probe with diameter of 10-15 Å is directed to run parallel to and outside a flat crystal surface, are sensitive to the surface nature of the crystals. Dynamical diffraction calculations have shown that most of the experimental observations for a flat (100) face of a MgO crystal, such as the streaking of the central spot in the surface normal direction and (100)-type forbidden reflections etc., could be explained satisfactorily by assuming a modified image potential field outside the crystal surface. However the origin of this extended surface potential remains uncertain. A theoretical analysis by Howie et al suggests that the surface image potential should have a form different from above-mentioned image potential and also be smaller by several orders of magnitude. Nevertheless the surface potential distribution may in practice be modified in various ways, such as by the adsorption of a monolayer of gas molecules.

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Lightning Impulse Impedance and Surface Potential Distribution of 10 kV Distribution Line Tower: Field Test and Simulation

IEEE Transactions on Power Delivery ◽

10.1109/tpwrd.2021.3061210 ◽

2021 ◽

pp. 1-1

Author(s):

Xue Jian ◽

Huan Huang ◽

Li Cai ◽

Zhiling Xu ◽

Yuqian Fang ◽

...

Keyword(s):

Surface Potential ◽

Field Test ◽

Potential Distribution ◽

Lightning Impulse ◽

Distribution Line

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System for Visualizing Surface Potential Distribution to Eliminate Electrostatic Charge

Sensors ◽

10.3390/s21134397 ◽

2021 ◽

Vol 21 (13) ◽

pp. 4397

Author(s):

Kazuya Kikunaga

Keyword(s):

Surface Potential ◽

Potential Distribution ◽

Measurement Accuracy ◽

High Spatial Resolution ◽

Scanning Speed ◽

Electrostatic Charge ◽

Production Quality ◽

Array Sensor ◽

The Relationship ◽

Non Destructive

A mixture of positive and negative static charges exists in the same plane on an insulator surface, and this can cause production quality problems at manufacturing sites. This study developed a system with a vibration array sensor to rapidly measure the surface potential distribution of an object in a non-contact and non-destructive manner and with a high spatial resolution of 1 mm. The measurement accuracy differed greatly depending on the scanning speed of the array sensor, and an optimum scanning speed of 10 mm/s enabled rapid measurements (within <3 s) of the surface potential distribution of a charged insulator (area of 30 mm × 30 mm) with an accuracy of 15%. The relationship between charge and dust on the surface was clarified to easily visualize the uneven static charges present on it and thereby eliminate static electricity.

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