Creation of Periodically Poled Lithium Niobate by Domain Structure Inversion with a Scanning Electron Microscope

2009 ◽  
Author(s):  
A. Nagyváradi ◽  
G. Almási
Keyword(s):  
Electron Microscope ◽  
Lithium Niobate ◽  
Scanning Electron Microscope ◽  
Domain Structure ◽  
Periodically Poled ◽  
Periodically Poled Lithium Niobate ◽  
Structure Inversion ◽  
Scanning Electron

Techniques of observation and characterization of the domain structure in periodically poled lithium niobate

2000 ◽  
Vol 15 (12) ◽  
pp. 2814-2821 ◽  
Author(s):  
V. Bermúdez ◽  
A. Gil ◽  
L. Arizmendi ◽  
J. Colchero ◽  
A. M. Baró ◽  
...  
Keyword(s):  
Lithium Niobate ◽  
Domain Structure ◽  
Periodic Structures ◽  
Electrostatic Force ◽  
Scanning Force Microscopy ◽  
Piezoelectric Response ◽  
Periodically Poled ◽  
Force Microscopy ◽  
Periodically Poled Lithium Niobate ◽  
Scanning Force

The domain structure of bulk periodically poled lithium niobate crystals were analyzed by different techniques. Images of topography, electrostatic force, and piezoelectric response were studied by scanning force microscopy. All these images showed the domain structure of the samples. The electrostatic force was always attractive pointing to a dielectric origin. The diffraction of a laser beam by the periodic structures was also observed, denoting a periodic change of refractive index. From the angle of diffraction the domain spatial frequency was directly obtained. The topographic profile of etched samples was studied by both scanning force and scanning electron microscopy.

Study of ferroelectric domains on G.A.S.H. single crystals by the scanning electron microscope

1978 ◽  
Vol 36 (1) ◽  
pp. 158-159
Author(s):  
R. Le Bihan ◽  
G. Jouet
Keyword(s):  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Single Crystals ◽  
Domain Structure ◽  
Ferroelectric Properties ◽  
Secondary Electron Emission ◽  
Incident Beam ◽  
Polar Axis ◽  
Decoration Technique ◽  
Scanning Electron

The ferroelectric properties of guanidine aluminium sulphate hexahydrate (G.A.S.H.) were discovered in 1955 (1). The polar axis was found to be perpendicular to the natural cleavage plane. The domain structure of G.A.S.H. have been observed by Pearson and Feldman (2) by pulver technique, Yuri at al. (3) by electroluminescence and B. Hilczer at al. (4-5) by electron microscope decoration techniqueWe study domain structure in G.A.S.H. single crystals whithout metallization with a scanning electron microscope (S.E.M.). Figure 1 shows the observations obtained on a no etched crystal observed with a scanning electron microscope in the secondary electron emission mode; we see a domain. When the accelerating voltage Vacc of the incident beam pass from 2.3 KV. to 5 KV. the contrast between domains is inversed. At 3.5 KV. the contrast is the same that at 5 KV. but the domain wall is more precise. The inversion of contrast is obtained between 3.3 KV. and 3.4 KV. ; and in this inversion zone we have not any contrast due to the domain or to its boundary.

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