The Structural, Dielectric, Raman-Spectral and Low-Temperature Properties of Amorphous PbTiO₃

Abstract

Amorphous ribbons of pure PbTiO 3 were obtained by the rapid solidification technique and were confirmed to be in the amorphous state by several different experimental techniques. Structural studies revealed clusters with radii up to about 150 Å, larger than those so far found in other materials such as metals or semiconductors in the amorphous state. Dielectric and Raman spectral studies confirmed that the material remains in the amorphous state indefinitely. Low-temperature studies showed that not only the amorphous state but also the crystalline state of PbTiO 3 has a dielectric constant minimum in the mK region, a characteristic of the amorphous state.