Single Crystal Study of Competing Rhombohedral and Monoclinic Order in Lead Zirconate Titanate

Published

November 12, 2010

Author(s)

Daniel P. Phelan, X. Long, Y. Xie, Z.-G. Ye, A. M. Glazer, H. Yokota, P. A. Thomas, Peter M. Gehring

Abstract

Neutron diffraction measurements were performed on single crystals of PbZr_1¿xTi_xO₃ (PZT)with x=0.325 and x=0.460. The data refute the thesis that the ferroelectric phases of PZT within this composition range, all of which are strongly piezoelectric, are purely monoclinic (Cc or Cm) by placing a severe limit on the magnitude of the structure factor of the {1/2 1/2 1/2} R₁ superlattice speak, which would be generated by the Cc phase, and by placing constraints on the monoclinic splittings of fundamental reflections. The compositional dependence of the broadening of certain Bragg reflections can be interpreted in terms of coexisting rhombohedral and monoclinic domains, whereby monoclinic order is enhanced by Ti-doping.

Citation

Physical Review Letters

Volume

105

Issue

20

Pub Type

Journals

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Keywords

diffraction, ferroelectric, relaxor, piezoelectric, neutron, morphotropic, MPB

Citation

Phelan, D. , Long, X. , Xie, Y. , Ye, Z. , , A. , Yokota, H. , , P. and Gehring, P. (2010), Single Crystal Study of Competing Rhombohedral and Monoclinic Order in Lead Zirconate Titanate, Physical Review Letters, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=907230 (Accessed April 23, 2024)