| Issue |
Europhys. Lett.
Volume 48, Number 3, November I 1999
|
|
|---|---|---|
| Page(s) | 326 - 331 | |
| Section | Condensed matter: electronic structure, electrical, magnetic and optical properties | |
| DOI | https://doi.org/10.1209/epl/i1999-00549-4 | |
| Published online | 01 September 2002 | |
Relaxor freezing and electric-field–induced ferroelectric transition in a lanthanum lead zirconate titanate ceramics
Jožef Stefan Institute - P.O. Box 3000, 1001 Ljubljana, Slovenia
Received:
6
May
1999
Accepted:
26
August
1999
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 (EC) the dc bias electric field induces a transition from the relaxor to the ferroelectric phase, while below EC 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.
PACS: 77.80.Bh – Phase transitions and Curie point / 78.20.Ci – Optical constants (including refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity) / 77.84.Dy – Niobates, titanates, tantalates, PZT ceramics, etc
© EDP Sciences, 1999
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