Magnetic circuit for Abrikosov vortices: Vortex motion in a periodic labyrinth of magnetic T and I-shaped elements under and above a superconducting film

ORAL

Abstract

We report on the comprehensive study of the arrays of magnetic T and I-letter-shaped thin permalloy elements on the Abrikosov vortex dynamics in superconducting niobium films deposited under or above the magnetic pattern. Direct observations of the vortex motion using magneto-optical imaging technique, supported by transport measurements at temperatures close to Tc, show that the TI-elements create a robust magnetic potential for vortices, which can be easily reconfigured with rotating a moderate in-plane field. Such a tunable magnetic potential allowing control of the vortex trajectories can be a useful tool for manipulating vortices in fluxonic devices, and have a potential for implementing vortex braiding in quantum Majorana operations.

*This work was supported by the U.S. Department of Energy (DOE), Office of Science, Materials Sciences and Engineering Division. We used sample manufacturing facilities of the Center for Nanoscale Materials, supported by the U.S. DOE, Office of Science, Office of Basic Energy Sciences, under Contract No. DE-AC02-06CH11357.

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Presenters

  • Vitalii K Vlasko-Vlasov

    • Argonne National Laboratory

Authors

  • Vitalii K Vlasko-Vlasov

    • Argonne National Laboratory

  • Andreas Rydh

    • Dept Phys, Stockholm Univ, S-10691 Stockholm, Sweden
    • Stockholm University

  • Divan Ralu

    • Center for Nanomaterials, Argonne National Laboratory, Argonne, Illinois 60439
    • Argonne National Laboratory

  • Daniel Rosenmann

    • Argonne National Laboratory
    • Center for Nanomaterials, Argonne National Laboratory, Argonne, Illinois 60439

  • Andreas Glatz

    • Argonne National Laboratory
    • ANL and Physics Department, Northern Illinois University, DeKalb, Illinois 60115

  • Allan Leishmann

    • ANL and Department of Physics, University of Notre Dame, Notre Dame, Indiana 46556

  • Ulrich Welp

    • Argonne National Laboratory
    • Materials Sciences Division, Argonne National Laboratory, Argonne, Illinois 60439

  • Wai-Kwong K Kwok

    • Argonne National Laboratory
    • Materials Sciences Division, Argonne National Laboratory, Argonne, Illinois 60439