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Josephson Junction with a Magnetic Vortex

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Abstract

We have studied Josephson tunneling through a circularly polarized micron or submicron-size disk of a soft ferromagnetic material. Such a disk contains a vortex that exhibits rich classical dynamics and has recently been proposed as a tool to study quantum dynamics of the nanoscale vortex core. The change in the Josephson current that is related to a tiny displacement of the vortex core has been computed analytically and plotted numerically for disks used in experiments. It is shown that a Josephson junction with a magnetic disk in the vortex state can be an interesting physical system that may be used to measure the nanoscale motion of the magnetic vortex.

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Acknowledgments

The work at the University of Barcelona was supported by the Spanish Government Project No. MAT2011-23698. The work of E.M.C. at Lehman College is supported by the Department of Energy through grant No. DE-FG02-93ER45487.

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Authors and Affiliations

  1. Departament de Física Fonamental, Facultat de Física, Universitat de Barcelona, Martí i Franquès 1, 08028, Barcelona, Spain

    R. Zarzuela & J. Tejada

  2. Physics Department, Lehman College, The City University of New York, 250 Bedford Park Boulevard West, Bronx, NY, 10468-1589, USA

    E. M. Chudnovsky

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  1. R. Zarzuela
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  2. E. M. Chudnovsky
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  3. J. Tejada
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Correspondence to R. Zarzuela.

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Zarzuela, R., Chudnovsky, E.M. & Tejada, J. Josephson Junction with a Magnetic Vortex. J Supercond Nov Magn 28, 1959–1965 (2015). https://doi.org/10.1007/s10948-015-2999-4

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  • DOI: https://doi.org/10.1007/s10948-015-2999-4

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