Abstract
Dielectric, anelastic, and NMR relaxation measurements have been made on the relaxor ferroelectric (PLZT) with . The dielectric susceptibility exhibits the frequency dispersive maximum due to the freezing of the polar degrees of freedom around . The anelastic and especially NMR relaxation, besides this maximum, indicate an intense and broad component at lower temperatures, attributed to rotational modes of the O octahedra, weakly coupled to the polar modes. It is discussed why such short range rotational instabilities, known to occur in the Zr-rich rhombohedral region of the PLZT phase diagram, might appear also in the Ti-rich region.
3 More- Received 4 November 2004
DOI:https://doi.org/10.1103/PhysRevB.71.094112
©2005 American Physical Society