Electric properties of alkali metal doped potassium niobate crystals

Authors

H Kimura, National Institute for Materials Science, Japan
R Tanahashi, National Institute for Materials Science, Japan
H Y. Zhao, National Institute for Materials Science, Japan
Z. Cheng, University of WollongongFollow
X L. Wang, University of Wollongong

RIS ID

47291

Abstract

Alkali metal (Na, Rb or Cs) doped KNbO₃ single crystals are grown using an original pulling down method by means of co-doping with Na (small ionic size), Rb (large ionic sizes) or Cs (large ionic sizes) into KNbO₃. Single-phase crystals are successfully grown with orthorhombic system at room temperature, for all the pure and doped KNbO₃. Their electric properties, such as the dielectric constant and the impedance, are found to be changed according to the co-doping elements.