Presentation 1993/7/26
Proximity Effect Coupling in a-axis YBCO/(Prx-Y1-x)BCO/YBCO Sandwich-Type Josephson Junctions
Toshimasa Umezawa, D. Lew, S.K. Streiffer, M.R. Beasley,
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Abstract(in Japanese) (See Japanese page)
Abstract(in English) We have studied proximity coupling in a-axis YBCO, (Pr_x-Y_1-x>) BCO/YBCO sandwich-type Josephson junctions.Growth parameters for the films were optimized for smoothness of the barrier interfaces and the films were well chracterized by SEM,AFM,and TEM.Transport of the barrier was highly dependent upon the doping:for x = 0,the resistivity followed a T^-1/4> behavior and was ~10^5Ω-cm at 4.2 K;for x = 0.55,the resistivity was nearly,metallic and was 10^-1>Ω -cm at 4.2K.For the small junction regime Wλj,the critical curren t scaled with junction area,and was modulated by magnetic field.We compare our results to other SNS work and find that the coherence length of the barrier increases with the conductivity of the barrier material.
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Keyword(in English) sandwich-type junctions / Y-doped PBCO barrier / coherence length / variable range hopping
Paper # SCE93-19
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Committee SCE
Conference Date 1993/7/26(1days)
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Registration To Superconductive Electronics (SCE)
Language JPN
Title (in Japanese) (See Japanese page)
Sub Title (in Japanese) (See Japanese page)
Title (in English) Proximity Effect Coupling in a-axis YBCO/(Prx-Y1-x)BCO/YBCO Sandwich-Type Josephson Junctions
Sub Title (in English)
Keyword(1) sandwich-type junctions
Keyword(2) Y-doped PBCO barrier
Keyword(3) coherence length
Keyword(4) variable range hopping
1st Author's Name Toshimasa Umezawa
1st Author's Affiliation Yokogawa Electric Corporation()
2nd Author's Name D. Lew
2nd Author's Affiliation Stanford University
3rd Author's Name S.K. Streiffer
3rd Author's Affiliation Stanford University
4th Author's Name M.R. Beasley
4th Author's Affiliation Stanford University
Date 1993/7/26
Paper # SCE93-19
Volume (vol) vol.93
Number (no) 166
Page pp.pp.-
#Pages 6
Date of Issue