| Abstract: | Alkali metals (Na, Rb or Cs) co‐doped with fiber‐ and bulk‐shaped KNbO3 single crystals were grown using two original methods by means of doping together of small ionic Na and large ionic Rb or Cs into KNbO3. Single‐phase crystals could be grown with an orthorhombic system at room temperature as well as pure KNbO3. Piezoelectric and ferroelectric property changes by the co‐doping of Rb or Cs with Na were estimated using d33 values and a polarization‐electric field hysteresis curve in fiber‐ and bulk‐shaped crystals. (© 2011 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim) |
