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Electrical conductivity and dynamics of electroforming in AlSiOxAl thin film sandwich structures by R.D. Gould; M.G. Lopez is a Engineering article available to read on EtoBox.

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Recent work has established that in evaporated SiO thin film sandwich structures with gold electrodes, which show the Poolex Frenkel effect (enhanced conductivity at high electric fields due to the lowering of the potential barrier at donor-like centres), the value of the Poole-Frenkel field-lowering coefficient b increases with voltage cycling prior to the onset of electroforming. These enhanced b values were associated with the establishment of a high-field region during the electroforming process. In the present work, aluminium electrodes were used in order to explore the characteristics of contrasting system. Electroforming occurred in some samples, but with a maximum current value of less than 1 mA, considerably less than with the gold electrodes. Poole-Frenkel conductivity was observed in the initial voltage cycles, with a b value of typically 4.5=10 eV m V , moderately y5 1 y2 y1y2 exceeding the theoretical value. Electroforming normally took place after several voltage cycles, but was not permanent, with a reversion to Poole-Frenkel conduction during some cycles. As for the case with gold electrodes, the value of b increased in the first few cycles, but after further voltag

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Author

R.D. Gould; M.G. Lopez

Publisher

Elsevier Science; Elsevier ; Elsevier Sequoia; Elsevier BV (ISSN 0040-6090)

Published

2003

Language

EN

Field

Engineering (Physical Sciences)