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Long range diffusion noise in platinum micro-wires with metallic adhesion layers

Z. Moktadir·J. W. van Honschoten·M. Elwenspoek
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Abstract

Voltage fluctuations of Platinum wires hosted by silicon nitride beams were investigated. We considered four variants of the wires: three with an adhesion layer and one with no adhesion layer. We found that the presence of an adhesion layer changes the nature of the power spectrum which is $1/f$ for wires with no adhesion layers and $1/f^{3/2}$ for wires with an adhesion layer. We attribute the value of the exponent $α=3/2$ to the long range diffusion of hydrogen originating from adhesion layers that undergo a migration through the Pt wires.

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Z. Moktadir, J. W. van Honschoten, M. Elwenspoek. 2007-03-26. Long range diffusion noise in platinum micro-wires with metallic adhesion layers. https://doi.org/10.1063/1.2746961

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