Observation of dc voltage on segments of an inhomogeneous superconducting loop

2001/05/18 by S. V. Dubonos, Dubonos, S. V., V. I. Kuznetsov +5
Engineering · Physics and Astronomy · #Advanced Electrical Measurement Techniques #Magnetic confinement fusion research #Superconducting Materials and Applications #physics.gen-ph

paper · pdf · doi:10.48550/arxiv.physics/0105059

4 pages, 4 figures

arxiv created 2001/05/18 · arxiv updated 2009/12/01

Abstract

In order to verify a possibility of a dc voltage predicted on segments of an inhomogeneous superconducting loop the Little-Parks oscillations are investigated on symmetrical and asymmetric Al loops. The amplitude of the voltage oscillations ΔV measured on segments of symmetrical loop increases with the measuring current I_m and ΔV = 0 at I_m= 0 in accordance with the classical Little-Parks experiment. Whereas the ΔV measured on segments of asymmetric loop has a maximum value at I_m= 0. The observation of the dc voltage at I_m= 0 means that one of the loop segments is a dc power source and others is a load. The dc power can be induced by both thermal fluctuation and a external electric noise.

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