# Magneto-Optical Functions at the 3p resonances of Fe, Co, and Ni: Ab-initio description and experiment

## TL;DR

This paper combines ab-initio calculations and experimental measurements to accurately describe the magneto-optical properties at the 3p resonances of Fe, Co, and Ni in the XUV range, emphasizing the importance of many-body effects.

## Contribution

It provides a comprehensive theoretical and experimental analysis of magneto-optical functions at 3p resonances, highlighting the significance of many-body corrections and local field effects.

## Key findings

- Many-body corrections are crucial for accurate spectra.
- Theoretical results agree well with experimental data.
- Results aid in ultrafast magnetization studies.

## Abstract

We present theoretical and experimental data on the magneto-optical contributions to the complex refractive index in the extreme ultraviolet (XUV) range covering the 3p resonances of Fe, Co, and Ni. Comparing the spectra from density functional theory with magnetic circular dichroism measurements we find that many body corrections and local field efects are of crucial importance for accurate description of the spectra. Our results are relevant for the application of static XUV spectroscopy for multi element magnetic systems as well as for the investigation of ultrafast magnetization dynamics.