Magnetic Exchange-Coupled Superconducting Devices with Broken Symmetry for Cryogenic Memory.

Authors

Josep Ingla-Aynés, Lina Johnsen Kamra, Franklin Dai, Yasen Hou, Shouzhuo Yang, Peng Chen, Oleg A Mukhanov, Jagadeesh S Moodera

Published in

Physical review letters. Volume 137. Issue 15. Pages 157001. Oct 09, 2026.

Abstract

Ultrathin superconducting (SC) films embedded between two ferromagnetic insulators (FI) experience magnetic-exchange coupling, enabling the switching of the superconducting state by controlling the relative FI magnetization alignment. We investigate micrometer-scale devices patterned from such thin-film heterostructures and demonstrate their reproducible operation as nonreciprocal superconducting memory elements. Single-cell writing is realized using current-pulse-induced, heat-assisted magnetic switching. Furthermore, at a lower temperature, symmetry breaking gives the memory elements a marked nonreciprocity, with zero magnetic field superconducting diode efficiencies exceeding ±60%. These results present highly scalable FI/SC/FI hybrid structures as a contender for state-of-the art robust superconducting memories for neuromorphic superconducting computing and new data guiding schemes.

PMID:
42949464
Bibliographic data and abstract were imported from PubMed on 28 Oct 2026.

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