The complex susceptibility of lead scandium tantalate relaxor ferroelectrics has been investigated for samples with varying degrees of long-range chemical ordering. The development of correlations between polar moments occurred relatively sharply near freezing in the highly ordered state, whereas the development of correlations in the partially ordered state occurred over a broadened temperature interval. The relaxation time distributions were also calculated. A sharp peak in the distribution was found on freezing in the highly ordered state, characteristic of a distinct condensation. The distribution in the partially ordered state was diffuse near freezing. It is proposed that in the highly ordered state the polar moments ‘‘freeze’’ into configurations with correlation lengths approaching the macroscopic scale typical of a normal ferroelectric, whereas in the partially ordered state the moments freeze into a polar state with glasslike characteristics.
No takes yet. Share an insight, caveat, or question.
Viehland et al. (1994) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: