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Hybrid superconducting-magnetic memory device using competing order parameters

Author

Listed:
  • Burm Baek

    (National Institute of Standards and Technology)

  • William H. Rippard

    (National Institute of Standards and Technology)

  • Samuel P. Benz

    (National Institute of Standards and Technology)

  • Stephen E. Russek

    (National Institute of Standards and Technology)

  • Paul D. Dresselhaus

    (National Institute of Standards and Technology)

Abstract

In a hybrid superconducting-magnetic device, two order parameters compete, with one type of order suppressing the other. Recent interest in ultra-low-power, high-density cryogenic memories has spurred new efforts to simultaneously exploit superconducting and magnetic properties so as to create novel switching elements having these two competing orders. Here we describe a reconfigurable two-layer magnetic spin valve integrated within a Josephson junction. Our measurements separate the suppression in the superconducting coupling due to the exchange field in the magnetic layers, which causes depairing of the supercurrent, from the suppression due to the stray magnetic field. The exchange field suppression of the superconducting order parameter is a tunable and switchable behaviour that is also scalable to nanometer device dimensions. These devices demonstrate non-volatile, size-independent switching of Josephson coupling, in magnitude as well as phase, and they may enable practical nanoscale superconducting memory devices.

Suggested Citation

  • Burm Baek & William H. Rippard & Samuel P. Benz & Stephen E. Russek & Paul D. Dresselhaus, 2014. "Hybrid superconducting-magnetic memory device using competing order parameters," Nature Communications, Nature, vol. 5(1), pages 1-6, September.
    • Handle: RePEc:nat:natcom:v:5:y:2014:i:1:d:10.1038_ncomms4888
    DOI: 10.1038/ncomms4888
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    Cited by:

    1. J. Díez-Mérida & A. Díez-Carlón & S. Y. Yang & Y.-M. Xie & X.-J. Gao & J. Senior & K. Watanabe & T. Taniguchi & X. Lu & A. P. Higginbotham & K. T. Law & Dmitri K. Efetov, 2023. "Symmetry-broken Josephson junctions and superconducting diodes in magic-angle twisted bilayer graphene," Nature Communications, Nature, vol. 14(1), pages 1-7, December.
    2. Linfeng Ai & Enze Zhang & Jinshan Yang & Xiaoyi Xie & Yunkun Yang & Zehao Jia & Yuda Zhang & Shanshan Liu & Zihan Li & Pengliang Leng & Xiangyu Cao & Xingdan Sun & Tongyao Zhang & Xufeng Kou & Zheng H, 2021. "Van der Waals ferromagnetic Josephson junctions," Nature Communications, Nature, vol. 12(1), pages 1-9, December.
    3. Taras Golod & Lise Morlet-Decarnin & Vladimir M. Krasnov, 2023. "Word and bit line operation of a 1 × 1 μm2 superconducting vortex-based memory," Nature Communications, Nature, vol. 14(1), pages 1-8, December.

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