Dielectric and AC conductivity behavior of BaBi2Nb2O9 ceramics

C. Karthik; K. B.R. Varma

doi:10.1016/j.jpcs.2006.06.012

Dielectric and AC conductivity behavior of BaBi₂Nb₂O₉ ceramics

C. Karthik, K. B.R. Varma

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85 Scopus citations

Abstract

The complex dielectric and AC conductivity response of BaBi₂Nb₂O₉ relaxor ferroelectric ceramics were studied as a function of frequency (100 Hz-10 MHz) at various temperatures. The observed dielectric behavior was characterized by two types of relaxation processes which were described by the 'universal relaxation law'. The frequency dependence of conductivity which showed a classical relaxor behavior followed the Jonscher's universal law σ (ω) = σ₀ + A ωⁿ. The exponent n exhibited a minimum in the vicinity of temperatures of dielectric anomaly while the pre-factor A showed a maximum. The temperature dependence of n followed the Vogel-Fulcher relation with activation energy of about 0.14 eV.

Original language	English
Pages (from-to)	2437-2441
Number of pages	5
Journal	Journal of Physics and Chemistry of Solids
Volume	67
Issue number	12
DOIs	https://doi.org/10.1016/j.jpcs.2006.06.012
State	Published - Dec 2006
Externally published	Yes

Keywords

A. Ceramics
A. Oxides
D. Dielectric properties

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10.1016/j.jpcs.2006.06.012

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title = "Dielectric and AC conductivity behavior of BaBi2Nb2O9 ceramics",

abstract = "The complex dielectric and AC conductivity response of BaBi2Nb2O9 relaxor ferroelectric ceramics were studied as a function of frequency (100 Hz-10 MHz) at various temperatures. The observed dielectric behavior was characterized by two types of relaxation processes which were described by the 'universal relaxation law'. The frequency dependence of conductivity which showed a classical relaxor behavior followed the Jonscher's universal law σ (ω) = σ0 + A ωn. The exponent n exhibited a minimum in the vicinity of temperatures of dielectric anomaly while the pre-factor A showed a maximum. The temperature dependence of n followed the Vogel-Fulcher relation with activation energy of about 0.14 eV.",

keywords = "A. Ceramics, A. Oxides, D. Dielectric properties",

author = "C. Karthik and Varma, {K. B.R.}",

year = "2006",

month = dec,

doi = "10.1016/j.jpcs.2006.06.012",

language = "English",

volume = "67",

pages = "2437--2441",

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TY - JOUR

T1 - Dielectric and AC conductivity behavior of BaBi2Nb2O9 ceramics

AU - Karthik, C.

AU - Varma, K. B.R.

PY - 2006/12

Y1 - 2006/12

N2 - The complex dielectric and AC conductivity response of BaBi2Nb2O9 relaxor ferroelectric ceramics were studied as a function of frequency (100 Hz-10 MHz) at various temperatures. The observed dielectric behavior was characterized by two types of relaxation processes which were described by the 'universal relaxation law'. The frequency dependence of conductivity which showed a classical relaxor behavior followed the Jonscher's universal law σ (ω) = σ0 + A ωn. The exponent n exhibited a minimum in the vicinity of temperatures of dielectric anomaly while the pre-factor A showed a maximum. The temperature dependence of n followed the Vogel-Fulcher relation with activation energy of about 0.14 eV.

AB - The complex dielectric and AC conductivity response of BaBi2Nb2O9 relaxor ferroelectric ceramics were studied as a function of frequency (100 Hz-10 MHz) at various temperatures. The observed dielectric behavior was characterized by two types of relaxation processes which were described by the 'universal relaxation law'. The frequency dependence of conductivity which showed a classical relaxor behavior followed the Jonscher's universal law σ (ω) = σ0 + A ωn. The exponent n exhibited a minimum in the vicinity of temperatures of dielectric anomaly while the pre-factor A showed a maximum. The temperature dependence of n followed the Vogel-Fulcher relation with activation energy of about 0.14 eV.

KW - A. Ceramics

KW - A. Oxides

KW - D. Dielectric properties

UR - http://www.scopus.com/inward/record.url?scp=33750484325&partnerID=8YFLogxK

U2 - 10.1016/j.jpcs.2006.06.012

DO - 10.1016/j.jpcs.2006.06.012

M3 - Article

AN - SCOPUS:33750484325

SN - 0022-3697

VL - 67

SP - 2437

EP - 2441

JO - Journal of Physics and Chemistry of Solids

JF - Journal of Physics and Chemistry of Solids

IS - 12

ER -

Dielectric and AC conductivity behavior of BaBi₂Nb₂O₉ ceramics

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Keywords

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