Raman study of morphotropic phase boundary in <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msub><mrow><mi mathvariant="normal">PbZr</mi></mrow><mrow><mn>1</mn><mi>−</mi><mi>x</mi></mrow></msub></mrow><mrow><msub><mrow><mi mathvariant="normal">Ti</mi></mrow><mrow><mi>x</mi></mrow></msub></mrow><mrow><msub><mrow><mi mathvariant="normal">O</mi></mrow><mrow><mn>3</mn></mrow></msub></mrow></math></span> at low temperatures

K. C. V. Lima; A. G. Souza Filho; A. P. Ayala; J. Mendes Filho; P. T. C. Freire; F. E. A. Melo; E. B. Araújo; J. A. Eiras

doi:10.1103/PhysRevB.63.184105

Raman study of morphotropic phase boundary in ${PbZr}_{1 - x} {Ti}_{x} O_{3}$ at low temperatures

K. C. V. Lima, A. G. Souza Filho, A. P. Ayala, J. Mendes Filho, P. T. C. Freire, F. E. A. Melo, E. B. Araújo, and J. A. Eiras

Phys. Rev. B 63, 184105 – Published 18 April 2001

Abstract

The Raman spectra of ${PbZr}_{1 - x} {Ti}_{x} O_{3}$ ceramics with titanium concentration varying between $x = 0.40$ and 0.60 were measured at 7 K. By observing the concentration-frequency dependence of the vibrational modes, we identified the boundaries among the rhombohedral, monoclinic, and tetragonal ferroelectric phases. The analysis of the spectra was made in the view of group theory analysis making possible the assignment of some modes for the monoclinic phase.

Received 25 August 2000

DOI:https://doi.org/10.1103/PhysRevB.63.184105

Authors & Affiliations

K. C. V. Lima, A. G. Souza Filho^*, A. P. Ayala, J. Mendes Filho, P. T. C. Freire, and F. E. A. Melo

Departamento de Física, Universidade Federal do Ceará, Caixa Postal 6030, Campus do Pici, 60455-760 Fortaleza, Ceará, Brazil

E. B. Araújo and J. A. Eiras

Departamento de Física, Universidade Federal de São Carlos, Caixa Postal 676, 13565-670 São Carlos, São Paulo, Brazil

^*Corresponding author. FAX: 55 (85) 2889903. Email address: agsf@fisica.ufc.br

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Vol. 63, Iss. 18 — 1 May 2001

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