Title :
Frequency response of MgO:LiNbO3 crystals
Author :
Jin, B.M. ; Bhalla, A.S. ; Kim, I.W. ; Park, B.C.
Author_Institution :
Mater. Res. Lab., Pennsylvania State Univ., University Park, PA, USA
Abstract :
MgO-doped congruent LiNbO3 were grown by the Czochralski method. All MgO-doped LiNbO3 crystals have a higher growing temperature than that of pure crystals. The frequency dependent dielectric spectra was measured to study the relaxational and conduction mechanism. Strong low frequency dispersion indicated that the main conduction mechanism of MgO-doped LiNbO3 is by charge carrier hopping which may be caused by defects or Mg-ions. Impedance spectra measurement show that this system does not satisfy a Debye law but Jonscher´s “universal law”
Keywords :
crystal growth from melt; electric impedance; ferroelectric materials; hopping conduction; impurities; lithium compounds; magnesium compounds; permittivity; piezoelectric materials; Czochralski method; LiNbO3:MgO; LiNbO3:MgO crystals; charge carrier hopping; conduction mechanism; congruent LiNbO3; defects; frequency dependent dielectric spectra; growing temperature; impedance spectra; low frequency dispersion; relaxation; Crystals; Dielectrics; Doping; Frequency measurement; Frequency response; Impedance measurement; Optical devices; Surface impedance; Temperature; Vibration measurement;
Conference_Titel :
Applications of Ferroelectrics, 1994.ISAF '94., Proceedings of the Ninth IEEE International Symposium on
Conference_Location :
University Park, PA
Print_ISBN :
0-7803-1847-1
DOI :
10.1109/ISAF.1994.522356
