Small-angle X-ray resonant magnetic scattering at the Co M$_{2,3}$ and L$_3$ edges observed with photoemission electron microscopy
Fuente:
arXiv
Gespeichert in:
| Hauptverfasser: | , , , , |
|---|---|
| Format: | Preprint |
| Veröffentlicht: |
2024
|
| Schlagworte: | |
| Online-Zugang: | |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| _version_ | 1866910323651379200 |
|---|---|
| author | Wartelle, Alexis Martínez, Marisel Di Pietro Fruchart, Olivier David, Philippe Beutier, Guillaume |
| author_facet | Wartelle, Alexis Martínez, Marisel Di Pietro Fruchart, Olivier David, Philippe Beutier, Guillaume |
| contents | X-ray magnetic circular dichroism is an efficient contrast mechanism allowing for a direct sensitivity to magnetization. Combined with an imaging technique such as photoemission electron microscopy, it has been successfully applied to high-resolution investigations of ferromagnetic thin films but also of three-dimensional systems thanks to the transmission-type contrast in their shadow. Our focus in this work is the wave-optics scattering pattern that can be observed near such a shadow's rim. Taking advantage of non-uniform magnetic states present in near-micron-size Co$_{1-x}$Gd$_x$ beads, we first show how X-ray resonant magnetic scattering affects the Fresnel diffraction at the Co L$_3$ edge. In order to confirm this observation, we then turn to the Co M$_{2,3}$ edges. There, we measure magnetic scattering patterns with a significantly increased spatial extent (due to the larger wavelength), despite the signal's weakness. The patterns' origin is supported by a comparison between our experimental data and a simple analytical model, then numerical simulations. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2402_06115 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Small-angle X-ray resonant magnetic scattering at the Co M$_{2,3}$ and L$_3$ edges observed with photoemission electron microscopy Wartelle, Alexis Martínez, Marisel Di Pietro Fruchart, Olivier David, Philippe Beutier, Guillaume Mesoscale and Nanoscale Physics X-ray magnetic circular dichroism is an efficient contrast mechanism allowing for a direct sensitivity to magnetization. Combined with an imaging technique such as photoemission electron microscopy, it has been successfully applied to high-resolution investigations of ferromagnetic thin films but also of three-dimensional systems thanks to the transmission-type contrast in their shadow. Our focus in this work is the wave-optics scattering pattern that can be observed near such a shadow's rim. Taking advantage of non-uniform magnetic states present in near-micron-size Co$_{1-x}$Gd$_x$ beads, we first show how X-ray resonant magnetic scattering affects the Fresnel diffraction at the Co L$_3$ edge. In order to confirm this observation, we then turn to the Co M$_{2,3}$ edges. There, we measure magnetic scattering patterns with a significantly increased spatial extent (due to the larger wavelength), despite the signal's weakness. The patterns' origin is supported by a comparison between our experimental data and a simple analytical model, then numerical simulations. |
| title | Small-angle X-ray resonant magnetic scattering at the Co M$_{2,3}$ and L$_3$ edges observed with photoemission electron microscopy |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2402.06115 |