IFLP   13074
INSTITUTO DE FISICA LA PLATA
Unidad Ejecutora - UE
artículos
Título:
PAC investigation in the Zr-rich region of the PZT phase diagram
Autor/es:
R.E. ALONSO; A. P. AYALA; A. LÓPEZ-GARCÍA; J. A. EIRAS
Revista:
PHYSICA B - CONDENSED MATTER
Editorial:
ELSEVIER LTD.
Referencias:
Lugar: Amsterdam; Año: 2007 vol. 389 p. 107 - 110
ISSN:
0921-4526
Resumen:
Previous studies using perturbed angular correlation (PAC) spectroscopy in the PbZr(1-x)Ti(x)O(3) (PZT) family of compounds show that whereas PbZrO3 is characterized by a single probe site with a very well-defined hyperfine interaction, in PZT with x>0.1 the probes occupy two distributed sites. In this work, we investigate the Zr-rich region of the PZT phase-diagram from x=0.02 up to x=0.08 using PAC in order to correlate the hyperfine parameters with the antiferroelectric-ferroelectric phase transition reported to occur at x=0.05. Two static electric quadrupole interactions, one of them fairly distributed, were detected over the whole Ti concentration range, and an abrupt change in the hyperfine parameters for 0.02<x<0.04 is observed. The behaviour of these parameters and the existence of two probe sites is discussed.