Contact Resistance of Several Metals on YBa_2Cu_3O_<7-δ>

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概要

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• The contact resistance of metal electrodes deposited on high T_c superconductor YBa_2Cu_3O_<7-δ> (YBCO) ceramics has been studied. Several metals such as Au, Ag, Cu, Pb, Sb and Al were employed. They have very different tendencies for oxidation, which can be measured by the free energy of oxide formation. The lower the free energy of the metal oxide is, the larger the electrode resistivity becomes. The electrode resistivity is defined by the inverse of conductance per unit area of the electrode. It is suggested that the main sources of contact resistance are the formation of an oxide layer on the metal side of the interface and the appearance of an oxygen-deficient layer on the YBCO surface. Using Au, Ag and Cu, for which free energy is high, electrodes of good quality were obtained where the etctrode resistivity was less than 10^<-6> Ω・cm^2.

• 社団法人応用物理学会の論文
• 1992-09-15

著者

• IRI Takeo

  Department of Applied Physics and Chemistry, The University of Electro-Communications

• Iri Takeo

  Department Of Applied Physics And Chemistry University Of Electro-communications

• Oka Katsutoshi

  Department of Applied Physics and Chemistry, University of Electro-Communications

• Oka Katsutoshi

  Department Of Applied Physics And Chemistry University Of Electro-communications

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