Structural, conductivity, and dielectric relaxation studies of La0.9Ba0.1GaO 3-δsystem

Kapil Sood; K. Singh; O. P. Pandey

doi:10.1080/02726351.2014.938379

Structural, conductivity, and dielectric relaxation studies of La_0.9Ba_0.1GaO _3-δsystem

Kapil Sood, K. Singh, O. P. Pandey

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1 Scopus citations

Abstract

La0.9Ba0.1GaO3-δ has been synthesized through solid-state reaction method. X-ray diffraction, AC conductivity, and scanning electron microscopy are used to investigate the structural properties and morphology of the system. X-ray refinement indicates that LaGaO3 is the major phase having an orthorhombic structure with the space group Ibmm. The study revealed that the Ba-dopant in the LaGaO3 creates oxygen vacancies, which are responsible to increase the ionic conductivity through hopping mechanism. The activation energy of the system is nearly ∼0.65 eV. It indicates that the major contribution to overall conductivity is ionic in the present system. The impedance behavior of the sample with frequency and temperature has been investigated using the Bode's plots. The loss tangent variation with temperature has been plotted to verify the relaxation behavior of the present system.

Original language	English
Pages (from-to)	113-118
Number of pages	6
Journal	Particulate Science and Technology
Volume	33
Issue number	2
DOIs	https://doi.org/10.1080/02726351.2014.938379
State	Published - 4 Mar 2015
Externally published	Yes

Keywords

AC conductivity
ceramics
scanningelectronmicroscopy
x-raydiffraction

Access to Document

10.1080/02726351.2014.938379

Cite this

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title = "Structural, conductivity, and dielectric relaxation studies of La0.9Ba0.1GaO 3-δsystem",

abstract = "La0.9Ba0.1GaO3-δ has been synthesized through solid-state reaction method. X-ray diffraction, AC conductivity, and scanning electron microscopy are used to investigate the structural properties and morphology of the system. X-ray refinement indicates that LaGaO3 is the major phase having an orthorhombic structure with the space group Ibmm. The study revealed that the Ba-dopant in the LaGaO3 creates oxygen vacancies, which are responsible to increase the ionic conductivity through hopping mechanism. The activation energy of the system is nearly ∼0.65 eV. It indicates that the major contribution to overall conductivity is ionic in the present system. The impedance behavior of the sample with frequency and temperature has been investigated using the Bode's plots. The loss tangent variation with temperature has been plotted to verify the relaxation behavior of the present system.",

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