Voltage-Dependent Bulk Resistivity of SrTiO3:Mg Ceramics
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Other documents of the author: Gil Escrig, Lidon; Prades Tena, Marta; Beltrán Mir, Héctor; Cordoncillo, Eloisa; Masó, Nahum; West, Anthony R.
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comunitat-uji-handle2:10234/7053
comunitat-uji-handle3:10234/8639
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Title
Voltage-Dependent Bulk Resistivity of SrTiO3:Mg CeramicsAuthor (s)
Date
2014Publisher
John Wiley & SonsISSN
1551-2916; 0002-7820Bibliographic citation
GIL ESCRIG, Lidon, et al. Voltage‐Dependent Bulk Resistivity of SrTiO3: Mg Ceramics. Journal of the American Ceramic Society, 2014, vol. 97, no 9, p. 2815-2824.Type
info:eu-repo/semantics/articlePublisher version
http://onlinelibrary.wiley.com/doi/10.1111/jace.13004/fullSubject
Abstract
Single phase ceramics of composition Sr(Ti1–xMgx)O3–x: 0 ≤ x ≤ 0.01 were prepared by sol–gel synthesis and characterized by X-ray diffraction, scanning electron microscopy, impedance spectroscopy, and current–voltage ... [+]
Single phase ceramics of composition Sr(Ti1–xMgx)O3–x: 0 ≤ x ≤ 0.01 were prepared by sol–gel synthesis and characterized by X-ray diffraction, scanning electron microscopy, impedance spectroscopy, and current–voltage measurements. The bulk and grain-boundary conductivities increase on application of a small dc bias voltage in the range 3–200 V/cm and at temperatures in the range 150°C–800°C. A qualitatively similar increase in conductivity occurs on increasinginline image in the surrounding atmosphere, which shows that conduction is p type. The conductivity increase is reversible on removal of the dc bias or on reducing inline image and is not observed in undoped SrTiO3. It is an intrinsic property of the bulk material, differs from the voltage-dependent effects observed with varistors and is attributed to changes in redox equilibria between oxygen species at the surface which cause changes in carrier concentration in the interior. A capacitive model of this low-field dc bias effect is presented and compared with a memristive model of high field resistance degradation. [-]
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Journal of the American Ceramic Society, 2014, vol. 97, no 9Rights
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