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Fabrication of Artificial Washboard Pinning Structures in Thin Niobium Films

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Abstract

We demonstrate a possibility to realize various types of the anisotropic washboard periodic pinning potentials in thin niobium films sputtered onto α-alumina (11\(\bar{2}\)0) substrates. Arrays of highly periodic channels as well as ferromagnetic cobalt lines were fabricated using focused ion-beam etching and gas-assisted focused electron beam deposition techniques, respectively. Three different nanostructure profiles which could provoke guided vortex motion were fabricated. By this way either uniaxial or bianisotropic, or asymmetric (ratchet) pinning structures have been realized. The results of scanning electron and atomic force microscopy investigations of the fabricated nanopatterns are discussed.

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Authors and Affiliations

  1. Physikalisches Institut, Goethe-Universität, 60438, Frankfurt am Main, Germany

    Oleksandr V. Dobrovolskiy & Michael Huth

  2. Physical Department, Kharkov National University, 61077, Kharkov, Ukraine

    Oleksandr V. Dobrovolskiy & Valerij A. Shklovskij

  3. Institute for Theoretical Physics, National Scientific Center—Kharkov Institute of Physics and Technology, 61108, Kharkov, Ukraine

    Valerij A. Shklovskij

Authors
  1. Oleksandr V. Dobrovolskiy
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  2. Michael Huth
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  3. Valerij A. Shklovskij
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Correspondence to Oleksandr V. Dobrovolskiy.

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Dobrovolskiy, O.V., Huth, M. & Shklovskij, V.A. Fabrication of Artificial Washboard Pinning Structures in Thin Niobium Films. J Supercond Nov Magn 24, 375–380 (2011). https://doi.org/10.1007/s10948-010-1055-7

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  • DOI: https://doi.org/10.1007/s10948-010-1055-7

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