Ferromagnetic Josephson switching device with high characteristic voltage

By T. Larkin, V. Bol’ginov, V. Stolyarov, V. Ryazanov, Igor V. Vernik, S. K. Tolpygo, Oleg A. Mukhanov. 2012

160 citations recorded by the source corpus.

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 μV 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.

Subfields: Condensed Matter Physics, Electrical and Electronic Engineering, Electronic, Optical and Magnetic Materials

View Paper: https://www.semanticscholar.org/paper/bc9e3c334e383fe1def8dc876cb42e6f85fae5e3