Voltage-Dependent Bulk Resistivity of SrTiO3:Mg Ceramics
Scholar | Otros documentos del autor: Gil Escrig, Lidon; Prades Tena, Marta; Beltrán Mir, Héctor; Cordoncillo Cordoncillo, Eloisa; Masó, Nahum; West, Anthony R.
MetadatosMostrar el registro completo del ítem
TítuloVoltage-Dependent Bulk Resistivity of SrTiO3:Mg Ceramics
Fecha de publicación2014
EditorJohn Wiley & Sons
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. [-]
Cita bibliográficaGIL 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 documentoinfo:eu-repo/semantics/article
Derechos de acceso
Copyright © John Wiley & Sons
Aparece en las colecciones
- QUIO_Articles