Dielectric relaxation in complex perovskite Ba(Bi1/2Ta1/2)O3

“…The hopping type of conduction is observed in Ba(Bi 1/2 Ta 1/2 )O 3 . The low dielectric loss of order of 10 -3 and high dielectric constant, e r of order of 10 5 indicate that it can be used as capacitor material [11]. The dielectric and ferroelectric responses of BiFeO 3 are enhanced by addition of BT whereas the dielectric loss is reduced by BT.…”

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confidence: 99%

Dielectric behavior of perovskite glass ceramics

Yadav

Gautam

2014

J Mater Sci: Mater Electron

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The recent developments of energy storage devices are concerned with larger energy storage ability, low loss and good temperature stability. It has a great technological importance in engineering science. The dielectric materials like ceramics and glass ceramics have great interest in electronic ceramic industry due to above concern. The ceramic dielectrics are used as a capacitive element in electronic circuits. The perovskite glass ceramics have very high dielectric constant and low dielectric loss. The high dielectric constant in glass ceramics is attributed to space charge polarization. In order to produce glass ceramics of high dielectric constant, barium titanate glass ceramics is the first discovered ferroelectric perovskite. In this review article, we are summarizing the dielectric behavior of perovskite glass ceramics such as

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“…BFO has non-zero remnant magnetization (M r ) of the value of 4.72 9 10 -4 emu/g at a coercive magnetic field (H c ) of 4.24 9 10 -6 kOe. This is because BFO is known to be anti-ferromagnetic having a G-type magnetic structure but has a residual magnetic moment due to a canted spin structure (weak ferromagnetic) [28]. However, the switching behaviour as observed in BDFO, at low fields is the most interesting and exchange observations of the field dependence of magnetization which occurs at room temperature.…”

Section: Magnetic Propertiesmentioning

confidence: 99%

A comparative study of structural, electrical and magnetic properties rare-earth (Dy and Nd)-modified BiFeO3

Pattanayak

Choudhary

Pattanayak

2014

J Mater Sci: Mater Electron

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The polycrystalline samples of BiFeO 3 (BFO) and rare earth-modified bismuth iron oxide, Bi 0.95 R 0.25 FeO 3 (R = Nd, Dy) (BNFO, BDFO) are prepared by a standard high-temperature solid-state reaction technique. A preliminary x-ray structural analysis is carried out to examine the structural deformation and stability of rare earth-modified BFO. Room temperature surface morphologies and textures of the samples are recorded by a scanning electron microscope, which reveals the uniform distribution of the plate-and rod-shaped grains. Studies of dielectric and electric properties in a wide frequency (1 kHz-1 MHz) and temperature (30-400°C) ranges using complex impedance spectroscopic method have provided many new results. The dielectric constant is found to be increases, and the tangent loss decreases as compared to BFO. The electrical polarizations (spontaneous and remnant) is found to be enhanced on rare-earth substitutions. Studies of ac conductivity suggest that the samples obey Jonscher's universal power law. The enhancement of magnetization was observed in rareearth doped samples compared to pure BFO.

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Dielectric relaxation in complex perovskite Ba(Bi1/2Ta1/2)O3

Cited by 18 publications

References 18 publications

Coexistence of interfacial stress and charge transfer in graphene oxide-based magnetic nanocomposites

Coexistence of interfacial stress and charge transfer in graphene oxide-based magnetic nanocomposites

Dielectric behavior of perovskite glass ceramics

A comparative study of structural, electrical and magnetic properties rare-earth (Dy and Nd)-modified BiFeO3

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