科研之友
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摘要
Using self-shunted MgB2/MgO/MgB2 Josephson junctions, we have designed, fabricated, and tested a rapid single flux quantum toggle flip flop (TFF) circuit. The junctions used MgB2 films grown by hybrid physical-chemical vapor deposition with MgO barrier layer and insulating layer deposited by RF magnetron sputtering. The result showed the frequency-division function of the TFF circuit, evidenced by the output voltage being half the input voltage, up to 63 GHz at 20K and 180 GHz at 3.2K, which demonstrates the potential of high operating speeds and high working temperatures in MgB2 superconducting integrated circuits.
- 出版日期2013-6-3
