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Direct observation of rectified motion of vortices by Lorentz microscopy

Authors :
Togawa, Yoshihiko
Harada, Ken
Akashi, Tetsuya
Kasai, Hiroto
Matsuda, Tsuyoshi
Maeda, Atsutaka
Tonomura, Akira
Source :
Pramana; January 2006, Vol. 66 Issue: 1 p279-287, 9p
Publication Year :
2006

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.

Details

Language :
English
ISSN :
03044289
Volume :
66
Issue :
1
Database :
Supplemental Index
Journal :
Pramana
Publication Type :
Periodical
Accession number :
ejs12634265
Full Text :
https://doi.org/10.1007/BF02704956