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

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

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

3 Citations (Scopus)

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.

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

Keywords

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

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