Title :
Low frequency nonlinearity in layered ferroelectrics BaBi2Nb2O9 and SrBi2Ta2O9
Author :
Bormanis, K. ; Kalvane, A. ; Burkhanov, A.I. ; Kochergin, Y.V.
Author_Institution :
Inst. of Solid State Phys., Univ. of Latvia, Riga, Latvia
Abstract :
The dielectric nonlinearity in layered ferroelectric ceramics of BaBi2Nb2O9 and SrBi2Ta2O9 is studied by analysing polarisation loops and measuring dielectric permittivity as a function of frequency. In case of BaBi2Nb2O9 the system has a broad phase transition manifesting essential features of a slow relaxation of polarisation; in case of SrBi2Ta2O9 the processes contributing to polarisation switching are driven by rearrangement of the domain structure.
Keywords :
barium compounds; bismuth compounds; dielectric polarisation; dielectric relaxation; electric domains; ferroelectric ceramics; ferroelectric switching; ferroelectric transitions; permittivity; strontium compounds; BaBi2Nb2O9; SrBi2Ta2O9; dielectric nonlinearity; dielectric permittivity; domain structure; layered ferroelectric ceramics; low frequency nonlinearity; phase transition; polarisation loop; polarisation relaxation; polarisation switching; Ceramics; Dielectrics; Frequency measurement; Permittivity; Shape; Switches; ceramics; dielectric response; layered ferroelectrics; phase transition; polarisation switching;
Conference_Titel :
Solid Dielectrics (ICSD), 2010 10th IEEE International Conference on
Conference_Location :
Potsdam
Print_ISBN :
978-1-4244-7945-0
Electronic_ISBN :
978-1-4244-7943-6
DOI :
10.1109/ICSD.2010.5568257
