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Effect of Cu Ions on the Dipole Moments and Polarization of Strontium Barium Niobate Single Crystals
Author(s) -
Xia H. R.,
Wang C. J.,
Yu H.,
Chen H. C.,
Song Y. Y.
Publication year - 1996
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.2170310714
Subject(s) - strontium barium niobate , dipole , ferroelectricity , polarization (electrochemistry) , barium , strontium , copper , materials science , infrared , doping , spectral line , crystal (programming language) , condensed matter physics , ion , coercivity , dielectric , optics , chemistry , optoelectronics , physics , organic chemistry , astronomy , computer science , metallurgy , programming language
The crystal growth, the ferroelectric hysteresis loops, and the infrared reflectivity spectra of coppermodified strontium barium niobate (SBN) single crystals are reported. Compared with the undoped SBN crystals, the copper‐modified crystals have stable hysteresis loops, the spontaneous polarization of which is about 0.30 C/m 2 , but that of the undoped SBN crystals is only about 0.12 C/m 2 . Their coercive field strength is all about 340 V/mm. The experimental results of the infrared spectra show that the infrared reflectivities vary as the orientations of the dipole moments owing to the copper‐doping. The c ‐axis becomes the most stable orientation of the dipole moments, and the polarization will be locked and won't recede if the copper‐modified crystals are polarized into monodomains.