Chapter VI ferroelectric and piezoelectric materials

The year i960 saw a continued increase in the volume of publications in the fields of ferroelectricity and piezoelectricity. Although twenty years have passed since the discovery of ferroelectricity in barium titanate, this material is still the favorite, with each budding center of scientific research making its voice heard in the chorus, usually with only minor changes of the tune. Russia again appears to be leading in volume and there is a fair proportion of valuable papers in the Russian literature, especially on the borderline substances where ferroelectricity is hard to separate from anomalous polarization.