Niobium doping and dielectric anomalies in bismuth titanate

A study of the complex permittivity in bismuth titanate was conducted to reveal the nature of an anomaly in the real part of the permittivity, which occurs below the Curie temperature. This anomaly is frequency dependent and is caused by a combination of two relaxation phenomena that appear in the imaginary part of the permittivity. One of the relaxations showed classic characteristics of an ion-jump process. Niobium doping suppressed this relaxation and eliminated the nonferroelectric anomaly in permittivity, Niobium is proposed to affect the ion-jump relaxation through a decrease in the concentration and possibly the mobility of oxygen vacancies.


Published in:
Journal of the American Ceramic Society, 83, 3, 528-532
Year:
2000
ISSN:
0002-7820
Note:
Shulman, Hs Ceralink Inc, Pompano Beach, FL 33060 USA Ecole Polytech Fed Lausanne, Lab Ceram, CH-1015 Lausanne, Switzerland
300CN
Times Cited:44
Cited References Count:20
Other identifiers:
Laboratories:




 Record created 2006-08-21, last modified 2018-03-17


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