This article has an erratum: [erratum]

Europhys. Lett.
Volume 48, Number 3, November 1999
Page(s) 326 - 331
Section Condensed matter: electronic structure, electrical, magnetic and optical properties
Published online 01 September 2002
DOI: 10.1209/epl/i1999-00549-4

Europhys. Lett, 48 (3), pp. 326-331 (1999)

Relaxor freezing and electric-field-induced ferroelectric transition in a lanthanum lead zirconate titanate ceramics

V. Bobnar, Z. Kutnjak, R. Pirc and A. Levstik

Jozef Stefan Institute - P.O. Box 3000, 1001 Ljubljana, Slovenia

(received 6 May 1999; accepted in final form 26 August 1999)

PACS. 77.80Bh - Phase transitions and Curie point.
PACS. 78.20Ci - Optical constants (including refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity).
PACS. 77.84Dy - Niobates, titanates, tantalates, PZT ceramics, etc.


Transition lines between various phases in the electric-field-temperature phase diagram of 9/65/35 lanthanum lead zirconate titanate ceramics were determined by measurements of the temperature and electric-field-dependent dielectric constant. Above the critical field ($E_{\rm C}$) the dc bias electric field induces a transition from the relaxor to the ferroelectric phase, while below $E_{\rm C}$ the system exhibits a freezing transition between the ergodic and nonergodic relaxor state. Transition lines are discussed in terms of the spherical random-bond-random-field model of relaxor ferroelectrics. Measurements in the quasistatic temperature regime confirm the prediction of the model that the nonlinear dielectric response shows a sharp peak at the freezing transition temperature.

Erratum: Figure 1


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