Blog
About

  • Record: found
  • Abstract: found
  • Article: found
Is Open Access

Polar and non-polar atomic motions in the relaxor ferroelectric PLZT from dielectric, anelastic and NMR relaxation

Preprint

Read this article at

Bookmark
      There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

      Abstract

      Dielectric, anelastic and ^139La NMR relaxation measurements have been made on the relaxor ferroelectric Pb(1-3x/2)La(x)Zr(0.2)Ti(0.8)O(3) (PLZT) with x = 0.22. The dielectric susceptibility exihibits the frequency dispersive maximum due to the freezing of the polar degrees of freedom around T ~250 K. 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.

      Related collections

      Most cited references 23

      • Record: found
      • Abstract: not found
      • Article: not found

      Diffuse phase transitions and random-field-induced domain states of the "relaxor" ferroelectric PbMg1/3Nb2/3O3.

      (1992)
        Bookmark
        • Record: found
        • Abstract: found
        • Article: found
        Is Open Access

        Origin of the high piezoelectric response in PbZr(1-x)TixO3

         R Guo,  G Shirane,  S-E. Park (1999)
        High resolution x-ray powder diffraction measurements on poled PbZr(1-x)TixO3 (PZT) ceramic samples close to the rhombohedral-tetragonal phase boundary (the so-called morphotropic phase boundary, MPB) have shown that for both rhombohedral and tetragonal compositions, the piezoelectric elongation of the unit cell does not occur along the polar directions but along those directions associated with the monoclinic distortion. This work provides the first direct evidence for the origin of the very high piezoelectricity in PZT.
          Bookmark
          • Record: found
          • Abstract: not found
          • Article: not found

          Soft-mode spectroscopy: Experimental studies of structural phase transitions

           J. Scott (1974)
            Bookmark

            Author and article information

            Journal
            05 November 2004
            cond-mat/0411136
            10.1103/PhysRevB.71.094112
            Custom metadata
            Phys. Rev. B 71, 094112 (2005)
            submitted to Phys. Rev. B, 9 pages, 10 figures
            cond-mat.mtrl-sci

            Comments

            Comment on this article