Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/16188
Title: Dielectric and pyroelectric properties of 〈111〉-oriented Fe-doped 0.62Pb(Mg1/3Nb2/3)O3-0.38PbTiO3 single crystals
Authors: Wan, X
Zhao, X
Luo, H
Chan, HLW 
Choy, CL 
Issue Date: 2005
Publisher: Wiley-Blackwell
Source: Journal of the American Ceramic Society, 2005, v. 88, no. 11, p. 3063-3066 How to cite?
Journal: Journal of the American Ceramic Society 
Abstract: Fe-doped 0.62Pb(Mg13Nb23)O3-0.38PbTiO3 (PMN-0.38PT) single crystals were grown by a modified Bridgman technique. Two kinds of single crystals with different iron ion molar ratios, (i) 0.2 mol% and (ii) 1.0 mol%, were obtained. The effect of doping iron ions on the dielectric and pyroelectric properties of the 〈111〉-oriented PMN-0.38PT single crystals was examined. The temperature of the permittivity maximum (Tm) exhibits no dispersion behavior and decreases with increasing doping concentration. The dielectric loss of the 0.2 mol% Fe-doped PMN-0.38PT single crystal is much lower than that of the high dopant content crystal (1.0 mol%) and undoped crystal, which makes it possess excellent pyroelectric performance. By a dynamic method, the measured pyroelectric coefficient and detectivity figure of merit (FD) of 0.2 mol% Fe-doped PMN-0.38PT single crystal are 439 μCm2·K and 56.3 μPa-12, respectively, both better than those of widely used pyroelectric single crystal LiTaO3. The results imply that the single crystal is a promising candidate for infrared detectors and other pyroelectric applications. The mechanism of doping effect was also discussed based on the principles of crystal chemistry.
URI: http://hdl.handle.net/10397/16188
ISSN: 0002-7820
EISSN: 1551-2916
DOI: 10.1111/j.1551-2916.2005.00585.x
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