Bulletin of the American Physical Society
APS March Meeting 2011
Volume 56, Number 1
Monday–Friday, March 21–25, 2011; Dallas, Texas
Abstract: S1.00291 : Vortex Confinement in Superconducting/Ferromagnet Hybrid Structures
Author:
Magnetically coupled superconductor-ferromagnet hybrids offer
advanced routes for nanoscale control of superconductivity.
Scanning tunneling microscopy (STM) and scanning magnetic force
microscopy (MFM) coupled to magneto-transport measurements reveal
rich vortex phase diagram.
The magnetic stripe domain of the ferromagnet induces periodic
local magnetic induction in the superconductor, creating a series
of pinning and anti-pinning channels for vortices observed with
low temperature STM and MFM. Such laterally confined Abrikosov
vortices form chains.
We also found general equilibrium condition for which
vortex-antivortex pairs are spontaneously formed during
zero-field cooling. In the non-equilibrium state the strong
magnetic pinning of the vortex lattice results in avalanches of
antivortices when changing the polarity of the applied magnetic
field.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2011.MAR.S1.291
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