Rb-doped potassium titanyl phosphate for periodic ferroelectric domain inversion
UNSPECIFIED. (2002) Rb-doped potassium titanyl phosphate for periodic ferroelectric domain inversion. JOURNAL OF APPLIED PHYSICS, 92 (5). pp. 2717-2723. ISSN 0021-8979Full text not available from this repository.
Official URL: http://dx.doi.org/10.1063/1.1496125
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|
|Official Date:||1 September 2002|
|Number of Pages:||7|
|Page Range:||pp. 2717-2723|
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