| 摘要 |
<p>Josephson contacts are fabricated in ceramic compounds from classes of high temperature superconductors. The succession of layers in the single-crystal determines the properties of the Josephson contacts. The supercurrent flows in the direction of the crystallographic c-axis. In a category of substances of high temperature superconductors the Josephson contacts are located in the space between each of two copper oxide double planes. In a different class of high temperature superconductors the Josephson contacts are located between each of two single copper oxide planes. The electrical properties such as critical supercurrent density, capacitance and shunt resistance of the Josephson contacts are adjusted by controlled addition or controlled withdrawal of oxygen. Using stacks of such intrinsic Josephson contacts within a single-crystal, current-controllable high frequency generators, Josephson voltage normals and SQUIDS can be realized. <IMAGE></p> |
