• Fulltext

       

        Click here to view fulltext PDF


      Permanent link:
      https://www.ias.ac.in/article/fulltext/pram/066/01/0279-0287

    • Keywords

       

      Ratchet; rectification; Lorentz microscopy; niobium

    • Abstract

       

      We have investigated the vortex dynamics for the ‘ratchet’ operation in a niobium superconductor via a direct imaging of Lorentz microscopy. We directly observe one-directional selective motion of field-gradient-driven vortices along fabricated channels. This results from the rectification of vortices in a spatially asymmetric potential under the oscillating magnetic field in a temporally symmetric manner. Based on the observation of the individual motion of vortices, we clarify the elementary process involved in this rectification.

    • Author Affiliations

       

      Yoshihiko Togawa1 Ken Harada1 2 Tetsuya Akashi2 3 Hiroto Kasai1 2 Tsuyoshi Matsuda1 4 Atsutaka Maeda1 5 Akira Tonomura1 2

      1. Frontier Research System, The Institute of Physical and Chemical Research (RIKEN), Hatoyama, Saitama - 350-0395, Japan
      2. Advanced Research Laboratory, Hitachi Ltd, Akanuma, Hatoyama, Saitama - 350-0395, Japan
      3. Hitachi Instruments Service Co. Ltd, Yotsuya, Shinjyuku-ku, Tokyo - 160-0004, Japan
      4. Hitachi Science Systems Ltd, Ishikawa, Hitachinaka, Ibaraki - 312-0057, Japan
      5. Department of Basic Science, The University of Tokyo, Komaba, Meguro-ku, Tokyo - 153-8902, Japan
    • Dates

       
  • Pramana – Journal of Physics | News

    • Editorial Note on Continuous Article Publication

      Posted on July 25, 2019

      Click here for Editorial Note on CAP Mode

© 2017-2019 Indian Academy of Sciences, Bengaluru.