Paper Title:
Electric Field-Induced Structural Modulation of Epitaxial PbZrTiO3 Ferroelectric Thin Films as Studied Using X-Ray Microdiffraction
  Abstract

This time, we would like to report our recent study on Pb(ZrTi)O3(PZT)-based ferroelectrics, currently one of interesting topics in condensed matter science. In this study, a new method, called synchrotron X-ray microdiffraction (XRMD) in situ, was introduced to examine the electric field-induced structural modulation of the epitaxially grown tetragonal PZT thin film. To evaluate the d-spacing (d001) from the measured intensity contour in the two theta-chi space, the peak position in each diffraction profile was determined by applying the two-dimensional Lorentzian fitting. By tracing the change of d-spacing as a function of the applied electric field and by examining the Landau free energy function for P4mm symmetry, we were able to estimate the two important parameters that characterize the field-induced structural modulation. Further theoretical analysis shows that the compressive epitaxial in-plane stress dominantly contributes to the elongation of the c-axis lattice constant in the c-axis oriented epitaxial PZT film.

  Info
Periodical
Advanced Materials Research (Volumes 26-28)
Edited by
Young Won Chang, Nack J. Kim and Chong Soo Lee
Pages
1079-1082
DOI
10.4028/www.scientific.net/AMR.26-28.1079
Citation
C. W. Bark, S. W. Ryu, Y. M. Koo, H. M. Jang, "Electric Field-Induced Structural Modulation of Epitaxial PbZrTiO3 Ferroelectric Thin Films as Studied Using X-Ray Microdiffraction", Advanced Materials Research, Vols. 26-28, pp. 1079-1082, 2007
Online since
October 2007
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