Journal
JOURNAL OF CRYSTAL GROWTH
Volume 408, Issue -, Pages 60-63Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jcrysgro.2014.09.013
Keywords
Characterization; Crystallites; Single crystal growth; Inorganic compound; Perovskite; Dielectric materials
Funding
- National Research Foundation of Korea (NRF) Grant - Korea Government (MEST) [2010-0027688]
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The CaCu3Ti4O12 (CCTO) single crystals could be grown from the melt with the nominal composition of Ca:Cu:Ti=1:59:20 in a platinum (Pt) crucible using a self-flux method. The flux-grown CCTO single crystals have well-developed {100} habit planes, and their compositions are close to the ratio of Ca:Cu: Ti=1:3:4, Interestingly, flux-grown CCTO single crystals exhibited two different back reflection Laue patterns: one exhibited only [100] cubic Laue patterns, and the other showed not only [100] cubic Laue patterns but also the satellite spots related to the twin boundary, implying that twin-free CCTO single crystals can be grown by the self-flux method. Both the dielectric constants and losses of twinned CCTO single crystal are significantly higher than those of untwined CCTO crystal at relatively low frequency regime (< 10 kHz), suggesting that the dielectric property is sensitive to the twin boundary. (C): 2014 Elsevier B.V. All rights reserved.
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