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Rb-doped potassium titanyl phosphate for periodic ferroelectric domain inversion
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UNSPECIFIED. (2002) Rb-doped potassium titanyl phosphate for periodic ferroelectric domain inversion. JOURNAL OF APPLIED PHYSICS, 92 (5). pp. 2717-2723. ISSN 0021-8979
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Official URL: http://dx.doi.org/10.1063/1.1496125
Abstract
This article reports the dielectric, conductive, and ferroelectric properties of Rb-doped potassium titanyl phosphate (RKTP) crystals, of formula type RbxK1-xTiOPO4, where x=0.0065 or 0.013, both of which are shown to undergo ferroelectric switching at room temperature with coercive fields varying from 2.3 to 2.7 kV/mm. The measured spontaneous polarizations are 0.18(+/-0.01) and 0.19(+/-0.01) Cm-2 for RbxK1-xTiOPO4 with x=0.0065 and x=0.013, respectively. The dependence of the conductivity of Rb:KTP on electric-field amplitude at high fields leads to distorted ferroelectric hysteresis loops. As a result of thermal effects and the redistribution of vacancies, the switching times and switching current peaks vary throughout a series of switching processes at a frequency of 20 Hz. The measured switching times range from 2 to 6 ms and are inversely proportional to the peak current densities. The dielectric relaxation of Rb:KTP is found to be further from the Debye response than that of KTP. A correlation effect is seen to play an important role in reducing the ac conductivity of Rb:KTP at low frequencies relative to that of KTP. The results are discussed in the context of obtaining a KTP derivative, which is suitable for periodic patterning by electric field poling at room temperature. (C) 2002 American Institute of Physics.
| Item Type: | Journal Article |
|---|---|
| Subjects: | Q Science > QC Physics |
| Journal or Publication Title: | JOURNAL OF APPLIED PHYSICS |
| Publisher: | AMER INST PHYSICS |
| ISSN: | 0021-8979 |
| Official Date: | 1 September 2002 |
| Volume: | 92 |
| Number: | 5 |
| Number of Pages: | 7 |
| Page Range: | pp. 2717-2723 |
| Identification Number: | 10.1063/1.1496125 |
| Publication Status: | Published |
| URI: | http://wrap.warwick.ac.uk/id/eprint/10655 |
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