Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/34071
Title: Structural, dielectric and optical properties of barium strontium sodium niobate (Sr0.7Ba0.3)2NaNb5Oi 15 single crystals
Authors: Yang, B
Li, F
Han, JP
Yi, XJ
Chan, HLW 
Chen, HC
Cao, W
Issue Date: 2004
Publisher: Institute of Physics Publishing
Source: Journal of physics. D, Applied physics, 2004, v. 37, no. 6, p. 921-924 How to cite?
Journal: Journal of physics. D, Applied physics 
Abstract: Barium strontium sodium niobate (Sr07Ba0.3) 2NaNb5O15 (SBNN70) crystals were grown by the Czochralski method. X-ray energy dispersive spectrometry showed that SBNN70 crystals have a stoichiometric composition nearly identical to the starting materials. X-ray diffraction of crushed powder indicated that the SBNN70 crystals are orthorhombic with a = 1.2748nm, b = 1.1402nm and c = 0.3898 nm. The measured temperature dependence of dielectric constants showed strongly anisotropic relaxor behaviour. The Curie temperature of the SBNN70 crystals is 186.7°C, which is 116°C higher than that of the (SrxBa 1-x)5Nb10O30 (SEN) crystal. The transmissivity and refractive index of [001] oriented SBNN70 single crystals were measured, and a deep energy level of 3.54 eV was found. The SBNN70 crystal has better than 70% optical transmittance for wavelengths above 500 nm. The refractive index of SBNN70 is 2.004 at 632.8 nm, which is lower than 2.3117 for SEN crystals.
URI: http://hdl.handle.net/10397/34071
ISSN: 0022-3727
EISSN: 1361-6463
DOI: 10.1088/0022-3727/37/6/017
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