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

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

2007-03-22

arxiv.org/abs/cond-mat/0703581v2

Physics

Condensed Matter

Statistical Mechanics

3 pages, 5 figures

Scientific paper

10.1063/1.2746961

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 $\alpha=3/2$ to the long range diffusion of hydrogen originating from adhesion layers that undergo a migration through the Pt wires.

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