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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.
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页数:10
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