Resonant soft x-ray magnetic scattering from the 4f and 3d electrons in DyFe(4)Al(8)

TL;DR

This study uses soft x-ray resonant scattering to investigate the charge and magnetic interactions in DyFe(4)Al(8), revealing complex magnetic behavior of Dy 4f and Fe 3d electrons and demonstrating the technique's ability to distinguish magnetic components.

Contribution

It provides new insights into the magnetic ordering of Dy and Fe electrons using soft x-ray diffraction at specific absorption edges, highlighting the technique's effectiveness in complex magnetic structures.

Findings

Observation of magnetic satellites below 60 K.

Complex spectra at Dy M(5) edge indicating split 4f band.

Constant Dy M(4)/M(5) intensity ratio across temperatures.

Abstract

Soft x-ray resonant scattering has been used to examine the charge and magnetic interactions in the cycloidal antiferromagnetic compound \dyfeal. By tuning to the Dy $M_4$ and $M_5$ absorption edges and the Fe L(2) and L(3) absorption edges we can directly observe the behavior of the Dy 4f and Fe 3d electron shells. Magnetic satellites surrounding the (110) Bragg peak were observed below 60 K. The diffraction peaks display a complex spectra at the Dy M(5) edge, indicative of a split 4f electron band. This is in contrast to a simple resonance observed at the Fe L(3) absorption edge, which probes the Fe 3d electron shell. Temperature dependant measurements detail the ordering of the magnetic moments on both the iron and the dysprosium antiferromagnetic cycloids. The ratio between the intensities of the Dy M(4) and M(5) remained constant throughout the temperature range, in contrast to a previous study conducted at the Dy L(2,3) edges. Our results demonstrate the ability of soft x-ray diffraction to separate the individual magnetic components in complicated multi-element magnetic structures.