Extracting the dynamic magnetic contrast in time-resolved X-ray transmission microscopy

Research output: Contribution to journalArticleScientificpeer-review

Researchers

  • Taddäus Schaffers
  • Thomas Feggeler
  • Santa Pile
  • Ralf Meckenstock
  • Martin Buchner
  • Detlef Spoddig
  • Verena Ney
  • Michael Farle
  • Heiko Wende
  • Sebastian Wintz
  • Markus Weigand
  • Hendrik Ohldag
  • Katharina Ollefs
  • Andreas Ney

Research units

  • Johannes Kepler University of Linz
  • University of Duisburg-Essen
  • Paul Scherrer Institute
  • Helmholtz-Zentrum Dresden-Rossendorf
  • Max Planck Institute for Intelligent Systems
  • Stanford University

Abstract

Using a time-resolved detection scheme in scanning transmission X-ray microscopy (STXM), we measured element resolved ferromagnetic resonance (FMR) at microwave frequencies up to 10 GHz and a spatial resolution down to 20 nm at two different synchrotrons. We present different methods to separate the contribution of the background from the dynamic magnetic contrast based on the X-ray magnetic circular dichroism (XMCD) effect. The relative phase between the GHz microwave excitation and the X-ray pulses generated by the synchrotron, as well as the opening angle of the precession at FMR can be quantified. A detailed analysis for homogeneous and inhomogeneous magnetic excitations demonstrates that the dynamic contrast indeed behaves as the usual XMCD effect. The dynamic magnetic contrast in time-resolved STXM has the potential be a powerful tool to study the linear and nonlinear, magnetic excitations in magnetic micro-and nano-structures with unique spatial-temporal resolution in combination with element selectivity.

Details

Original languageEnglish
Article number940
JournalNanomaterials
Volume9
Issue number7
Publication statusPublished - 1 Jul 2019
MoE publication typeA1 Journal article-refereed

    Research areas

  • Ferromagnetic resonance, Scanning transmission X-ray microscopy, X-ray magnetic circular dichroism

ID: 36792754