Dielectric and tunable ferroelectric properties in BiFeO3-BiCoO3-BaTiO3ternary compound

被引:12
作者
Shankar, S. [1 ,2 ]
Maurya, I [1 ]
Raj, Abhishek [3 ]
Singh, Sukhbir [4 ]
Thakur, O. P. [5 ]
Jayasimhadri, M. [2 ]
机构
[1] Univ Delhi, ARSD Coll, Dept Phys, Expt Res Lab, New Delhi 110021, India
[2] Delhi Technol Univ, Dept Appl Phys, Luminescent Mat Res Lab, Bawana Rd, New Delhi 110042, India
[3] Acad Sci & Innovat Res AcSIR, Ghaziabad 201002, Uttar Pradesh, India
[4] Natl Phys Lab, Electron & Ion Microscopy, Dr KS Krishnan Marg, New Delhi 110012, India
[5] NSUT, Mat Anal & Res Lab, Dept Phys, New Delhi 110078, India
来源
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING | 2020年 / 126卷 / 09期
关键词
XRD; Ferroelectric properties; Dielectric properties; Entropy; ENERGY-STORAGE DENSITY; MULTIFERROIC PROPERTIES; RELAXOR FERROELECTRICS; TERNARY-SYSTEM; CERAMICS; TEMPERATURE; PEROVSKITE;
D O I
10.1007/s00339-020-03872-0
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The ternary compound BiFeO3-BiCoO3-BaTiO3(BFO-BCO-BT) was prepared using the solid-state reaction method. The dielectric studies display strong frequency-dependent anomaly in the vicinity of Curie temperature (T-C) approximate to 350 degrees K and exhibit strong diffusive relaxor behavior with (gamma approximate to 1.61). The dielectric measurements confirm stabilization in BFO-BT solid solution due to BCO addition. The P-E loops display strong ferroelectric behavior and frequency variation indicating major dominant domain wall movement on high dielectric constant in the BFO-BCO-BT ternary compound. The magnetic field variation in theP-Eloop displays strong magnetoelectric coupling originating from interfacial polarization with maximum coupling coefficient of 115 mV/cm-Oe at field of 500 Oe. The temperature variation ofP-Eshows enhanced configurational entropy due to increase in activation energy, with the highest isothermal energy (Delta S) = 0.15 J/kg/K obtained forE = 15 kV/cm andT = 125 degrees C. These studies provide tunable ferroelectric properties of BFO-BCO-BT for exploration of promising applications such as refrigeration and magnetoelectricity.
引用
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页数:10
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