A change in domain morphology in optical superlattice induced by thermal annealing

Autor:	Yong-Yuan Zhu, Yan-qing Lu, Qi Luo, Cheng‐cheng Xue, Xiangfei Chen, Ya-Lin Lu, Nai-Ben Ming
Rok vydání:	1997
Předmět:	Materials science Condensed matter physics Annealing (metallurgy) Superlattice Lithium niobate Condensed Matter Physics Spontaneous polarization Condensed Matter::Materials Science chemistry.chemical_compound Crystallography chemistry Czochralski method Curie temperature General Materials Science
Zdroj:	Journal of Physics: Condensed Matter. 9:747-752
ISSN:	1361-648X 0953-8984
Popis:	Optical superlattice crystals were grown by the Czochralski method. The effect of thermal annealing below the Curie temperature on domain structures of a sample with good periodicity was studied. It was found that the periodic domain structure remained unchanged at annealing temperature lower that and began to deteriorate when annealed at above . A sample at for an hour almost changed to a single-domain structure except that a single-domain layer with reversed spontaneous polarization was formed at the edge of the sample. These results are useful for revealing the mechanism of formation of the periodic domain structure and designing a more favourable temperature field to improve the crystals' quality. A space-charge-field model was proposed to explain the phenomena.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::0e7cca294a93a6ecb50b8986a48b8334 https://doi.org/10.1088/0953-8984/9/3/014 Zobrazit plný text záznamu