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Abstract
The formation of charged domain walls (CDWs) in the bulk was studied in lithium tantalate LiTaO3 (LT) and lithium niobate LiNbO3 (LT) crystals with various composition gradients along the polar axis produced by partial vapor transport equilibration (VTE). Under the action of the pyroelectric field upon cooling after the phase transition, the shape of a CDW in LT changed significantly, in contrast to LN: the ledges appeared at CDW and grew toward the polar surfaces. The creation of tail-to-tail and head-to-head CDWs with controlled shape is important for various applications.
Additional information
Funding
The research was made possible by Russian Science Foundation (project no. 19-12-00210), https://rscf.ru/project/19-12-00210/. The equipment of the Ural Center for Shared Use “Modern nanotechnology” Ural Federal University (Reg. no. 2968), which is supported by the Ministry of Science and Higher Education RF (Project no. 075-15-2021-677), was used.