摘要
Superconducting step-edge junctions were fabricated on step-edges in (100) LaAlO3 substrates by sputter-deposited epitaxial YBaCuO and TIBaCaCuO thin films. The substrate steps were patterned by ion beam etching using metal film as a mask. The transport properties of the junctions were characterized by four-probe electrical measurements. The critical current-normal resistance product (ICRN) was larger than 0.2mV (77K) for most of the junctions. Clear Shapiro steps were observed in the current-voltage characteristics of the junctions with 36GHz or 95GHz millimeter-wave irradiation. The high frequency properties of these high Tc Josephson junctions showed that they were quite suitable for the Josephson harmonic mixer used in the digital phase locked millimeter and sub-millimeter wave sources.
源语言 | 英语 |
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页(从-至) | 2798-2800 |
页数 | 3 |
期刊 | IEEE Transactions on Applied Superconductivity |
卷 | 5 |
期 | 2 |
DOI | |
出版状态 | 已出版 - 6月 1995 |
已对外发布 | 是 |