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Updated: May 29, 2026

Scanning SQUID Study of Vortex Manipulation by Local Contact
Published on: February 1, 2017
Flow of a single magnetic vortex in a submicron-size superconducting Al disk controlled by radio-frequency currents
Atsushi Harada1, Kengo Enomoto, Yamaguchi Takahide
1National Institute for Materials Science, Ibaraki, Japan.
Abstract:
We report the first observation of a single-vortex flow in a mesoscopic superconductor. A flow of a single vortex is successfully controlled by an rf current superimposed on a dc current, evidence of which is provided by voltage steps in current-voltage (I-V) characteristics. Irrespective of the number of vortices confined to the disk, we unambiguously observe that when a single vortex inside the disk is driven out of the disk, another vortex enters the disk similarly to two balls colliding in billiards: only one vortex passes through the Al disk at the same time in mesoscopic systems.
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