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Growth and characterization of ferroelectric SrBi2Ta2O9 single crystals via high-temperature self-flux solution method
Amori n H.1, Bdikin I.K.1,2, Kholkin A.L.1, Costa M.E.V.1
1Department of Ceramics and Glass Engineering & Center for Research in Ceramic and Composite Materials (CICECO), University of Aveiro,-193 Aveiro, Portugal
2Institute of Solid State Physics, Russian Academy of Sciences, Chernogolovka, Russia
Email: kholkin@cv.ua.pt
Поступила в редакцию: 24 июня 2005 г.
Выставление онлайн: 17 февраля 2006 г.

SrBi2Ta2O9 (SBT) single crystals were produced by high temperature self-flux solution method using a Bi2O3 flux modified with B2O3. The processing conditions were optimized to obtain large and translucent SBT crystals with a layered habit and typical dimensions of approximately 7-1ptx-1pt5-1ptx-1pt0.2 mm. X-ray diffraction and x-ray topography measurements revealed the major faces of the crystals with natural rectangular platelet morphology are perfectly (001)-orientated with edges directed along the [110] directions. High quality of the crystals was confirmed by rocking curves (half width of 0.04o for the (0 0 18) reflection) and by ferroelectric measurements. The anisotropy in the dielectic and ferroelectric properties was investigated both along the [110] (ab-plane) and the [001] (c-axis) directions. The growth mechanism, morphology and dielectric anisotropy of the SBT crystal platelets are discussed based on its crystallographic structure. H. Amori n and I.K. Bdikin acknowledge the Foundation for Science and Technology (FCT, Portugal) for the financial support through Ph.D. and Postdoctoral grants, respectively. PACS: 77.84.-s, 81.10.-h
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