K. Matyjasek, Switching kinetics of 180 degrees domains in telluric acid ammonium phosphate crystals with large unipolarity, J APPL PHYS, 90(10), 2001, pp. 5268-5273
The switching process in unipolar telluric acid ammonium phosphate crystal
has been studied by a combination of optical observation of the domain stru
cture in low electric fields and electrical switching measurements in high
fields. The stabilization mechanism of 180 degrees domains appears to have
a correlation to a defect-induced internal field E-b in the crystal. In cry
stal sample with E-b>E-c (E-c, coercive field measured from D-E hysteresis
loop), the spontaneous repolarization of the crystal occurs after the remov
al of the applied field. It has been found that E-b acts as a driving field
causing nucleation and growth of back-switching domains. (C) 2001 American
Institute of Physics.