Crystal growth of alkali metal ion doped potassium niobate fiber single crystals

Authors

Hideo Kimura, National Institute For Materials Science, Japan
R Tanahashi, National Institute For Materials Science, Japan
Hongyang Zhao, National Institute For Materials Science, Japan
K Maiwa, National Institute For Materials Science, Japan
Zhenxiang Cheng, University of WollongongFollow
Xiaolin Wang, University of WollongongFollow

RIS ID

32920

Publication Details

Kimura, H, Tanahashi, R, Zhao, H, Maiwa, K, Cheng, Z & Wang, P (2010), Crystal growth of alkali metal ion doped potassium niobate fiber single crystals, Optical Materials, 32(7), pp. 735-738.

Abstract

Alkali metal (Na, Rb or Cs) ion doped KNbO₃ fiber single crystals are grown using an original pulling down method, to improve their composition change during a crystal growth, by means of co-doping of small ionic size Na and large ionic size Rb or Cs into KNbO₃. In spite of the co-doping, single crystals can be grown with orthorhombic single-phase at room temperature, as well as pure KNbO₃. Their electric properties, such as impedance, are changed depending on the doping ions. Na and Rb co-doped KNbO₃ is promising Pb free ferroelectric and piezoelectric crystals.