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arXiv · 1205.3372

Ferromagnetic Josephson switching device with high characteristic voltage

T. I. Larkin·V. V. Bol'ginov·V. S. Stolyarov·V. V. Ryazanov·I. V. Vernik·S. K. Tolpygo·O. A. Mukhanov
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Abstract

We develop a fast Magnetic Josephson Junction (MJJ) - a superconducting ferromagnetic device for a scalable high-density cryogenic memory compatible in speed and fabrication with energy-efficient Single Flux Quantum (SFQ) circuits. We present experimental results for Superconductor-Insulator-Ferromagnet-Superconductor (SIFS) MJJs with high characteristic voltage IcRn of >700 uV proving their applicability for superconducting circuits. By applying magnetic field pulses, the device can be switched between MJJ logic states. The MJJ IcRn product is only ~30% lower than that of conventional junction co-produced in the same process, allowing for integration of MJJ-based and SIS-based ultra-fast digital SFQ circuits operating at tens of gigahertz.

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T. I. Larkin, V. V. Bol'ginov, V. S. Stolyarov, V. V. Ryazanov, I. V. Vernik, S. K. Tolpygo, O. A. Mukhanov. 2012-05-15. Ferromagnetic Josephson switching device with high characteristic voltage. https://doi.org/10.1063/1.4723576

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