Density of states and impedance behaviour of transition metal substituted SrBi2Nb2O9 ferroelectric nanoceramics prepared by chemical process

被引：5

作者：

Adak, Mrinal K. ^{[1
]}

Dhak, Debasis ^{[1
]}

机构：

[1] Sidho Kanho Birsha Univ, Dept Chem, Purulia 723104, India

来源：

JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS | 2017年 / 28卷 / 11期

关键词：

DIELECTRIC-PROPERTIES; HOPPING CONDUCTIVITY; PHASE-TRANSITIONS; AC CONDUCTIVITY; SPECTROSCOPY; RELAXATION; MODULUS; OXIDE; TEMPERATURE;

D O I：

10.1007/s10854-017-6481-x

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Nanocrystalline layered perovskite Sr(0.5)A(0.5)Bi(2)Nb(2)O(9) (A = Co2+, Ni2+, Cu2+) ferroelectric ceramics were synthesized through chemical process. The synthesized compounds were found to have tolerance values 0.90, 0.865 and 0.872 which are well within its limit. The electrical behaviour was thoroughly studied through impedance analysis within the temperature range between 400 degrees C and 500 degrees C after sintering the pressed pellet at 750 degrees C for 4h. Strong relaxation behaviour was found for Sr0.5Co0.5Bi2Nb2O9 and Sr0.5Cu0.5Bi2Nb2O9. The ac activation energy was calculated from the relaxation behaviour. All the studied samples showed grain conductivity behaviour only. The binding energy and density of states were studied with respect to temperature and frequency. The hopping behaviour was also studied and established a correlated barrier hopping model.

引用

页码：7844 / 7853

页数：10

共 53 条

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