Variations in electrical properties of Nb-doped SrTiO3 with cation nonstoichiometry

Jung Ho Moon; Seong Ho Kim; Keun Il Park; Yoonho Kim; Keon Kim

doi:10.1080/713716059

Variations in electrical properties of Nb-doped SrTiO₃ with cation nonstoichiometry

Jung Ho Moon, Seong Ho Kim, Keun Il Park, Yoonho Kim, Keon Kim

Research output: Contribution to journal › Article › peer-review

Abstract

The influences of Sr/(Ti+Nb) ratios on the electrical properties of Nb-doped SrTiO 3 ceramics have been investigated. Regardless of Sr/(Ti+Nb) ratios, the appearance of non-linearity in the current-voltage characteristics was observed. When Sr/(Ti+Nb) ratio is lower than 1.000, the results acquired from impedance analysis revealed that the activation energies for carrier conduction were determined to be 0.83 eV in grains and 1.67 eV in grain boundaries. Otherwise, the specimens with Sr/(Ti+Nb) ≥ 1.004 showed energies of 0.80 eV in grains and 1.27 eV in grain boundaries. From these measured results, it was suggested that the activation energies, about 0.80 eV, measured in grains were originated from oxygen vacancies and the activation energies, 1.27 and 1.67 eV, measured in grain boundaries were from titanium and strontium vacancies, respectively.

Original language	English
Pages (from-to)	267-272
Number of pages	6
Journal	Ferroelectrics
Volume	269
DOIs	https://doi.org/10.1080/713716059
Publication status	Published - 2002 Jan 1

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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title = "Variations in electrical properties of Nb-doped SrTiO3 with cation nonstoichiometry",

abstract = "The influences of Sr/(Ti+Nb) ratios on the electrical properties of Nb-doped SrTiO 3 ceramics have been investigated. Regardless of Sr/(Ti+Nb) ratios, the appearance of non-linearity in the current-voltage characteristics was observed. When Sr/(Ti+Nb) ratio is lower than 1.000, the results acquired from impedance analysis revealed that the activation energies for carrier conduction were determined to be 0.83 eV in grains and 1.67 eV in grain boundaries. Otherwise, the specimens with Sr/(Ti+Nb) ≥ 1.004 showed energies of 0.80 eV in grains and 1.27 eV in grain boundaries. From these measured results, it was suggested that the activation energies, about 0.80 eV, measured in grains were originated from oxygen vacancies and the activation energies, 1.27 and 1.67 eV, measured in grain boundaries were from titanium and strontium vacancies, respectively.",

author = "Moon, {Jung Ho} and Kim, {Seong Ho} and Park, {Keun Il} and Yoonho Kim and Keon Kim",

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doi = "10.1080/713716059",

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journal = "Ferroelectrics",

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T1 - Variations in electrical properties of Nb-doped SrTiO3 with cation nonstoichiometry

AU - Moon, Jung Ho

AU - Kim, Seong Ho

AU - Park, Keun Il

AU - Kim, Yoonho

AU - Kim, Keon

PY - 2002/1/1

Y1 - 2002/1/1

N2 - The influences of Sr/(Ti+Nb) ratios on the electrical properties of Nb-doped SrTiO 3 ceramics have been investigated. Regardless of Sr/(Ti+Nb) ratios, the appearance of non-linearity in the current-voltage characteristics was observed. When Sr/(Ti+Nb) ratio is lower than 1.000, the results acquired from impedance analysis revealed that the activation energies for carrier conduction were determined to be 0.83 eV in grains and 1.67 eV in grain boundaries. Otherwise, the specimens with Sr/(Ti+Nb) ≥ 1.004 showed energies of 0.80 eV in grains and 1.27 eV in grain boundaries. From these measured results, it was suggested that the activation energies, about 0.80 eV, measured in grains were originated from oxygen vacancies and the activation energies, 1.27 and 1.67 eV, measured in grain boundaries were from titanium and strontium vacancies, respectively.

AB - The influences of Sr/(Ti+Nb) ratios on the electrical properties of Nb-doped SrTiO 3 ceramics have been investigated. Regardless of Sr/(Ti+Nb) ratios, the appearance of non-linearity in the current-voltage characteristics was observed. When Sr/(Ti+Nb) ratio is lower than 1.000, the results acquired from impedance analysis revealed that the activation energies for carrier conduction were determined to be 0.83 eV in grains and 1.67 eV in grain boundaries. Otherwise, the specimens with Sr/(Ti+Nb) ≥ 1.004 showed energies of 0.80 eV in grains and 1.27 eV in grain boundaries. From these measured results, it was suggested that the activation energies, about 0.80 eV, measured in grains were originated from oxygen vacancies and the activation energies, 1.27 and 1.67 eV, measured in grain boundaries were from titanium and strontium vacancies, respectively.

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JO - Ferroelectrics

JF - Ferroelectrics

ER -

Variations in electrical properties of Nb-doped SrTiO₃ with cation nonstoichiometry

Abstract

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