Geometric Effects in Current-Voltage Characteristics of a Cross-Shaped MDM Ni/NiO/Fe Structure

The current–voltage ( I – U ) characteristics of a cross-shaped metal-dielectric-metal (MDM) Ni/NiO/Fe structures with NiO layers of different thicknesses are investigated. The dependence of the sign of the differential resistance on the current flowing through the structure and on the thickness of...

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Bibliographic Details
Published in:Russian microelectronics 2018-05, Vol.47 (3), p.181-186
Main Authors: Malikov, I. V., Berezin, V. A., Fomin, L. A., Mikhailov, G. M.
Format: Article
Language:English
Subjects:
Contact potentials
Current voltage characteristics
Electrical Engineering
Electron transport
Engineering
Flow resistance
Interlayers
Iron
Nickel oxides
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Summary:The current–voltage ( I – U ) characteristics of a cross-shaped metal-dielectric-metal (MDM) Ni/NiO/Fe structures with NiO layers of different thicknesses are investigated. The dependence of the sign of the differential resistance on the current flowing through the structure and on the thickness of the NiO in a four-contact measuring system of potentials is revealed. In a region 8–10 nm thick, the voltage on the structure changes sign thrice and has the form of an N-shaped curve. This dependence is explained by the geometric effect, which appears due to the competition between the vertical and lateral electron transport, when the ratio of the resistances of the dielectric interlayer and metallic leading electrodes changes under the influence of the current. The numerical calculation confirms the experimentally observed I – U dependences.
ISSN:1063-7397
1608-3415
DOI:10.1134/S1063739718030095