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 language | English |
|---|---|
| Article number | 940 |
| Pages (from-to) | 1-13 |
| Number of pages | 13 |
| Journal | Nanomaterials |
| Volume | 9 |
| Issue number | 7 |
| DOIs | |
| Publication status | Published - 2019 |
Fields of science
- 210006 Nanotechnology
- 103 Physics, Astronomy
- 103011 Semiconductor physics
- 103018 Materials physics
- 202032 Photovoltaics
- 103009 Solid state physics
- 103017 Magnetism
JKU Focus areas
- Sustainable Development: Responsible Technologies and Management