Magnetization changes visualized using photoemission electron microscopy

  • Oelsner A
  • Krasyuk A
  • Neeb D
 et al. 
  • 5

    Readers

    Mendeley users who have this article in their library.
  • 7

    Citations

    Citations of this article.

Abstract

Photoemission electron microscopy was used to visualize the motion of magnetic domains on a sub-nanosecond timescale. The technique exploits the imaging of magnetic domains using soft X-ray circular dichroism, with the special feature that the instrument utilizes a fast image acquisition system with intrinsic 125ps time resolution. The overall time resolution used is about 500ps. Different domains and domain movements have been observed in lithographically-produced Permalloy structures on a copper microstrip-line. A current pulse of I=0.5A with rise times of about 300ps switched the Permalloy islands from a Landau-Lifshitz type domain configuration into metastable s-state domain configurations. A pulse with opposite direction could reverse these s-type patterns. Photoemission electron microscopy was employed to observe the domain movements while repeating current pulses passed the microstrip-line. Using small unipolar amplitudes, only the cross-tie walls of the s-type patterns disappear and the pattern becomes "fuzzy", e.g. the domain rims are not sharp and some domains change their size. Before the structure switches at a current threshold, it is more fluctuating as shown by significant differences in sharpness of the islands rim and the inter-domain boundaries show. The device behavior complicates when a bi-polar pulse is applied. Switching and oscillating of domains is observed in various manners, e.g. very tiny domains appear and unify again. © 2004 Elsevier B.V. All rights reserved.

Author-supplied keywords

  • Magnetic x-ray circular dichroism
  • Magnetization dynamics
  • Micro-magnetism
  • Microstrip-line
  • Time resolved photoemission electron microscopy

Get free article suggestions today

Mendeley saves you time finding and organizing research

Sign up here
Already have an account ?Sign in

Find this document

Authors

  • A. Oelsner

  • A. Krasyuk

  • D. Neeb

  • S. A. Nepijko

  • A. Kuksov

  • C. M. Schneider

Cite this document

Choose a citation style from the tabs below

Save time finding and organizing research with Mendeley

Sign up for free