Characteristics and Alternating Modulation of Y_1Ba_2Cu_3O_<7-y> Superconducting Flux Flow Transistors

概要

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The characteristics and the measurement of lower critical magnetic field of Y_1Ba_2Cu_3O_<7-y> superconducting flux flow transistors (SFFTs) are reported. The devices are fabricated by forming the channels of vortex flow onto step edge of SrTiO_3 substrates. Reproducible transistor behaviors are observed, and the operation temperature is over 70 K. A method for measuring the lower critical field H (c1) from the magnetic field of both control current and bias current is also presented. We find that H (cl) of the Y_1Ba_2Cu_3O_<7-y> SFFT is 0.9 G at 70 K using this method. Alternating modulation of the device is investigated, which shows transresistances of over 10 Ω and output resistances of about 5 Ω.
社団法人応用物理学会の論文
1994-08-15