Extracting the Dynamic Magnetic Contrast in Time-Resolved X-Ray Transmission Microscopy

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

doi:10.3390/nano9070940

Title: Extracting the Dynamic Magnetic Contrast in Time-Resolved X-Ray Transmission Microscopy

Journal Article · 27 June 2019 · Nanomaterials

DOI: https://doi.org/10.3390/nano9070940 · OSTI ID:1530009

Schaffers, Taddäus; Feggeler, Thomas; Pile, Santa; Meckenstock, Ralf; Buchner, Martin; Spoddig, Detlef; Ney, Verena; Farle, Michael; Wende, Heiko;

; Weigand, Markus; Ohldag, Hendrik; Ollefs, Katharina;

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.

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Sponsoring Organization:: USDOE

Grant/Contract Number:: AC02-76SF00515

OSTI ID:: 1530009

Alternate ID(s):: OSTI ID: 1560800

Journal Information:: Nanomaterials, Journal Name: Nanomaterials Journal Issue: 7 Vol. 9; ISSN 2079-4991; ISSN NANOKO

Publisher:: MDPI AGCopyright Statement

Country of Publication:: Switzerland

Language:: English

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