Relaxor behaviour of Pb[(Mg3/4Co1/4)1/3Nb2/3]O3 ceramic

Prasad, K.; Kumar, Ashok; Choudhary, S. N.; Choudhary, R. N. P.

doi:10.1016/j.ssi.2005.04.004

Cited by 26 publications

(7 citation statements)

References 22 publications

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“…The value of FWHM is found to be >1.14 decades. These observations indicate that the distribution function for relaxation times is nearly temperature‐independent with non‐exponential conductivity relaxation, which suggests the possibility of ion migration that takes place via hopping accompanied by a consequential time‐dependent mobility of other charge carriers of the same type in the vicinity 34.…”

Section: Resultsmentioning

confidence: 86%

Structural and impedance spectroscopy analysis of Ba(Fe_1/2Nb_1/2)O₃ ceramic

Bhagat

Prasad

2010

Physica Status Solidi (a)

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Lead-free perovskite Ba(Fe 1/2 Nb 1/2 )O 3 (BFN) was prepared by conventional ceramic fabrication technique at 1200 8C/5 h in air atmosphere. The crystal symmetry, space group, and unit cell dimensions were determined from the experimental results using FullProf software whereas crystallite size and lattice strain were estimated from Williamson-Hall approach. X-ray diffraction (XRD) analysis of the compound indicated the formation of a single-phase monoclinic structure with the space group P2/m. EDAX and SEM studies were carried out in order to evaluate the quality and purity of the compound. To find a correlation between the response of the real system and idealized model circuit composed of discrete electrical components, the model fittings were presented using the impedance data. Complex impedance analyses suggested the dielectric relaxation to be of non-Debye type. The correlated barrier hopping (CBH) model was employed to successfully explain the mechanism of charge transport in BFN.

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Section: Resultsmentioning

confidence: 86%

Structural and impedance spectroscopy analysis of Ba(Fe_1/2Nb_1/2)O₃ ceramic

Bhagat

Prasad

2010

Physica Status Solidi (a)

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“…The value of full‐width at half‐maximum (FWHM) is found to be >1.14 decades. These observations indicate that the distribution function for relaxation times is nearly temperature independent with nonexponential conductivity relaxation, which suggests the possibility of ion migration that takes place via hopping accompanied by a consequential time‐dependent mobility of other charge carriers of the same type in the vicinity 27 . The most probable frequency ω m (=1/τ) was obtained from the frequency at which is observed.…”

Section: Resultsmentioning

confidence: 90%

Structural and Electrical Properties of Lead‐Free Perovskite Ba(Al_1/2Nb_1/2)O₃

Prasad

Chandra

Bhagat

et al. 2009

Journal of the American Ceramic Society

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Lead-free perovskite Ba(Al 1/2 Nb 1/2 )O 3 was prepared by conventional ceramic fabrication technique at 13501C/5 h in air atmosphere. The crystal symmetry, space group and unit cell dimensions were determined from the experimental results using FullProf software whereas crystallite size and lattice strain were estimated from Williamson-Hall approach. X-ray diffraction analysis of the compound indicated the formation of a singlephase monoclinic structure with the space group P2/m. EDAX and SEM studies were carried out in order to evaluate the quality and purity of the compound. Permittivity data showed lowtemperature coefficient of capacitance (T CC 5 14%) up to 1001C. To find a correlation between the response of the real system and idealized model circuit composed of discrete electrical components, the model fittings were presented using the impedance data. Complex impedance analyses suggested the dielectric relaxation to be of non-Debye type. The correlated barrier-hopping model was used to successfully explain the mechanism of charge transport in Ba(Al 1/2 Nb 1/2 )O 3 .

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“…A non-exponential type relaxation gov- erned by Eq. (1) suggests the possibility of ion migration that takes place via hopping accompanied by a consequential timedependent mobility of other charge carriers of the same type in the vicinity occurs [21]. Fig.…”

Section: Impedance Studiesmentioning

confidence: 96%