Eur. Phys. J. AP
Volume 15, Number 2, August 2001
|Page(s)||97 - 104|
|Section||Surfaces, Interfaces and Films|
|Published online||15 August 2001|
Microwave dielectric relaxation of ferroelectric PLZT ceramics in the range of 300-900 K
Département de Physique, Faculté des
Sciences et Techniques, Université Hassan 1er, Settat, Morocco
2 Département de Physique, Faculté des Sciences, Université Moulay Ismaïl, Meknes, Morocco
3 PIOM, ENSCPB, avenue Pey-Berland, BP 108, 33402 Talence, France
4 ICMCB, avenue du Dr. A. Schweitzer, 33608 Pessac, France
Corresponding author: firstname.lastname@example.org
Revised: 26 December 2000
Accepted: 15 March 2001
Published online: 15 August 2001
Dielectric response of PLZT(x/65/35) ceramics (with x = 0, 2, 4, 5) was studied using radio frequency and microwave techniques in the temperature range 300−900 K and with a frequency range of 102 Hz-3 × 109 Hz. Dielectric relaxation appears around 1 × 109 Hz at room temperature. The relaxation frequency softens at Tc and the dielectric relaxation exists in both paraelectric and ferroelectric phases and depends on x the lanthanum concentration. A model of correlation chains gives some keys for understanding the frequency behaviour of such materials.
PACS: 77.84.Dy – Niobates, titanates, tantalates, PZT ceramics, etc. / 77.22.Gm – Dielectric loss and relaxation / 41.20.Jb – Electromagnetic wave propagation; radiowave propagation
© EDP Sciences, 2001
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