期刊
RESULTS IN PHYSICS
卷 20, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.rinp.2020.103623
关键词
Ferroelectricity; Colossal dielectric; Dipole relaxation; Maxwell-Wagner relaxation; Impedance analysis; Interfacial response
资金
- National Natural Science Foundation of China [51872001, 51572001]
- Open Research Fund Program of the State Key Laboratory of Low-Dimensional Quantum Physics [KF201803]
BiFeO3 was co-doped with (Ca, Pb) to obtain Bi1-x(Ca1/2Pb1/2)(x)FeO3, which showed colossal dielectric constant and reduced Curie temperature, exhibiting characteristics of ferroelectric phase transition.
BiFeO3 was co-doped with (Ca, Pb) to obtain Bi1-x(Ca1/2Pb1/2)(x)FeO3 (x = 0, 0.1 and 0.3) and their structural, morphological, dielectric and ferroelectric properties were studied. The temperature dependent (from 173 to 573 K) dielectric permittivity showed that samples have colossal dielectric constant (CDC) around room temperature. The pure sample had no signs of ferroelectric-phase-transition peak whereas the co-doped samples showed signs of ferroelectric-phase-transition-induced dielectric anomaly with an extremely huge intensity over 10(6) beyond 573 K. thus, suitable doping of (Ca, Pb) has significantly reduced the Curie temperature towards lower temperature range 536 and 516 K for samples with x = 0.1 and 0.3.
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