Characterization of temperature-dependent superlattice in Cu:KTN crystal

In this study, we grew CuO doped potassium tantalum niobate (Cu:KTN) crystals with a uniform superlattice structure by the off-center top-seeded solution growth (TSSG) method. The process of crystal superlattice structure formation was observed under a polarizing microscope at variable temperatures....

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Bibliographic Details
Published in:Materials research express 2020-12, Vol.7 (12), p.126202
Main Authors: Zhang, Fei, Liu, Bing, Yang, Cheng-Kai, Hu, Yan-Yan, Zhang, Hua-Di, Li, Qing-Gang, Wang, Xu-Ping, Zhang, Yuan-Yuan, Yang, Yu-Guo, Wei, Lei
Format: Article
Language:English
Subjects:
Crystal structure
Crystals
Domain structure
Domains
KTN
Low temperature
Superlattice structure
Superlattices
Tantalum
Temperature dependence
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Summary:In this study, we grew CuO doped potassium tantalum niobate (Cu:KTN) crystals with a uniform superlattice structure by the off-center top-seeded solution growth (TSSG) method. The process of crystal superlattice structure formation was observed under a polarizing microscope at variable temperatures. It was found that the formation of the superlattice structure in the crystal was closely related to the formation process of the domain structure in the crystal. The 90° domain structure in the crystal promoted the formation of the superlattice structure in the crystal. The purpose of the formation of the superlattice structure is to enable the crystal to reach a more stable state. The clear diffraction effect of the crystal superlattice structure is similar to the x-ray diffraction phenomenon of low-temperature crystals, and it exists in the crystal in a three-dimensional structure.
ISSN:2053-1591
2053-1591
DOI:10.1088/2053-1591/abd216