Voltage-Dependent Bulk Resistivity of SrTiO3:Mg Ceramics
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Otros documentos de la autoría: Gil Escrig, Lidon; Prades Tena, Marta; Beltrán Mir, Héctor; Cordoncillo, Eloisa; Masó, Nahum; West, Anthony R.
Metadatos
Mostrar el registro completo del ítemcomunitat-uji-handle:10234/9
comunitat-uji-handle2:10234/7053
comunitat-uji-handle3:10234/8639
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Título
Voltage-Dependent Bulk Resistivity of SrTiO3:Mg CeramicsAutoría
Fecha de publicación
2014Editor
John Wiley & SonsISSN
1551-2916; 0002-7820Cita bibliográfica
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.Tipo de documento
info:eu-repo/semantics/articleVersión de la editorial
http://onlinelibrary.wiley.com/doi/10.1111/jace.13004/fullPalabras clave / Materias
Resumen
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 9Derechos de acceso
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