Monoclinic phase of PbZr0.52Ti0.48O3 ceramics:: Raman and phenomenological thermodynamic studies

被引：67

作者：

Souza, AG

Lima, KCV

Ayala, AP

Guedes, I

Freire, PTC

Mendes, J

Araújo, EB

Eiras, JA

机构：

[1] Univ Fed Ceara, Dept Fis, BR-60455760 Fortaleza, Ceara, Brazil

[2] Univ Fed Sao Carlos, Dept Fis, BR-13565670 Sao Carlos, SP, Brazil

来源：

PHYSICAL REVIEW B | 2000年 / 61卷 / 21期

关键词：

D O I：

10.1103/PhysRevB.61.14283

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

This work reports Raman detection of the tetragonal --> monoclinic phase transition in PbZr0.52Ti0.48O3 ceramics near the morphotropic phase boundary at low temperatures. The transition is characterized by changes in the frequency of lattice modes with temperature. The results presented here confirm the previous one recently reported by Noheda et al. [Appl. Phys. Lett. 74, 2059 (1999)] using high-resolution synchrotron x-ray powder diffraction technique and dielectric measurements. The stability of the new phase is discussed within the framework of phenomenological Landau-Devonshire theory.

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页码：14283 / 14286

页数：4

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