TY - JOUR
T1 - Characteristics of YBa2Cu3O7-y Josephson junctions prepared with smooth ramp-edge surfaces
AU - Wang, L. M.
AU - Sung, H. H.
AU - Yang, H. C.
AU - Chen, M. J.
AU - Wu, C. H.
AU - Chiu, N. L.
AU - Horng, H. E.
N1 - Funding Information:
*Supported by the National Science Council of lLO.C, under grant No. NSC 89-2112-M-212-001
PY - 2000/11
Y1 - 2000/11
N2 - YBa2Cu3O7-y ramp-type Josephson junctions with PrBa2Cu3O7-y and SrTiO3 barriers have been fabricated on SrTiO3 (001) substrates. The surface morphology of the ramp-edge was examined using the atomic force microscope (AFM). The conditions of the photolithography process and the ion beam incident angle were optimized to improve the surface roughness at the ramp-edge. Typically, smooth surfaces at the ramp-edge with a ramp angle of about 25° and an average roughness of about 3 nm was achieved. Results indicate the junction properties are improved with a smooth ramp-edge surface. The details are discussed.
AB - YBa2Cu3O7-y ramp-type Josephson junctions with PrBa2Cu3O7-y and SrTiO3 barriers have been fabricated on SrTiO3 (001) substrates. The surface morphology of the ramp-edge was examined using the atomic force microscope (AFM). The conditions of the photolithography process and the ion beam incident angle were optimized to improve the surface roughness at the ramp-edge. Typically, smooth surfaces at the ramp-edge with a ramp angle of about 25° and an average roughness of about 3 nm was achieved. Results indicate the junction properties are improved with a smooth ramp-edge surface. The details are discussed.
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U2 - 10.1016/S0921-4534(00)01460-X
DO - 10.1016/S0921-4534(00)01460-X
M3 - Conference article
AN - SCOPUS:0343397360
SN - 0921-4534
VL - 341-348 (IV)
SP - 2729
EP - 2730
JO - Physica C: Superconductivity and its applications
JF - Physica C: Superconductivity and its applications
T2 - International Conference on Materials and Mechanisms of Superconductivity High Temperature Superconductors VI
Y2 - 20 February 2000 through 25 February 2000
ER -