Identification of local magnetic contributions in a Co$_{2}$FeBO$_{5}$ single crystal by XMCD spectroscopy

The temperature dependences of the X-ray absorption spectra (XAS) and of the spectra of X-ray magnetic circular dichroism (XMCD) are measured near the $L_{3,2}$ absorption edges of Co and Fe in ludwigite Co$_{2}$FeBO$_{5}$ single crystals. The antiparallel orientation of the magnetic moments of cobalt and iron is demonstrated. The coercive fields related to cobalt and iron ions are determined. The orbital ($m_{l}$) and ($m_{s}$) spin contributions to the total magnetic moments of cobalt and iron ions are identified. The ratios and relative directions of $m_{l}$ and $m_{s}$ are found.