REVISIT TO THE ANOMALY IN DIELECTRIC-PROPERTIES OF (BA1-XSRX)(ZN1 3NB2/3)O-3 SOLID-SOLUTION SYSTEM/

In our present study, the anomalous variation in temperature coefficie nt and permittivity of (Ba1-xSrx)(Zn1/3Nb2/3)O-3 (BSZN) with chemical composition was investigated with respect to the order-disorder behavi or of the system. It was observed that dielectric properties such as p ermittivity, temperature coefficient, and quality factor revealed syst ematic variation not only with composition but also with sintering tem perature. The origin of the latter variation was ascribed to the chang e in bond character accompanied by the order-disorder behavior. With t he aid of X-ray diffraction accompanied by a critical review of previo us research, it is suggested that a short-range modulation of crystal structure rather than a change in long-range crystal structure is the origin of the temperature coefficient and permittivity anomalies appar ent in the BSZN system.