Transformation of initial domain structure by ac electric field in lithium tantalate crystals with composition gradient

Abstract

A transformation of the initial three-layer domain structure in lithium tantalate with composition gradient and formation of charged domain wall (CDW) under application of ac electric field have been studied on the surface and in the bulk. We have demonstrated the abilities to produce several types of domain structure by ac field treatment: (1) a layer of the maze structure in the bulk with lower thickness and domain wall concentration, (2) a CDW situated just in the center of the plate, and (3) a decay of the initial domain structure leading to formation of large through domains.

Keywords:

• Charged domain walls
• vapor transport equilibration
• stoichiometry deviation
• polarization reversal
• domain shape

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Acknowledgment

The equipment of the Ural Center for Shared Use “Modern Nanotechnology” of Ural Federal University was used.

Correction Statement

This article has been republished with minor changes. These changes do not impact the academic content of the article.

Additional information

Funding

The reported study was funded by RFBR, project number 19-32-90050. VS is grateful for financial support of the Ministry of Science Higher Education of the Russian Federation (state task FEUZ-2020-0054).