The study investigates the transmission of synchrotron radiation through magnetized iron at energies above the \(K\)-absorption edge, observing relative differences in circular polarization of several times \(10^{-4}\). The observed spin-dependent near-edge photoabsorption is proportional to the difference in spin densities of unoccupied bands. In the extended absorption region up to 200 eV above the Fermi level, a small spin-dependent absorption is detected, providing information on the magnetic neighborhood of the absorbing atom. The method uses circularly polarized X-rays from a high-energy storage ring, allowing for the measurement of spin-dependent absorption above the \(K\)-edge of \(3d\) ferromagnets. The results are compared with an "itinerant" electron model, offering insights into the magnetic structure of the material. The experimental setup and data analysis are detailed, showing a maximum spin-dependent absorption at 2 eV and a minimum at 7 eV, corresponding to a majority-spin and minority-spin band, respectively. The findings suggest that spin-dependent X-ray absorption can be a valuable tool for studying the magnetic properties of materials.The study investigates the transmission of synchrotron radiation through magnetized iron at energies above the \(K\)-absorption edge, observing relative differences in circular polarization of several times \(10^{-4}\). The observed spin-dependent near-edge photoabsorption is proportional to the difference in spin densities of unoccupied bands. In the extended absorption region up to 200 eV above the Fermi level, a small spin-dependent absorption is detected, providing information on the magnetic neighborhood of the absorbing atom. The method uses circularly polarized X-rays from a high-energy storage ring, allowing for the measurement of spin-dependent absorption above the \(K\)-edge of \(3d\) ferromagnets. The results are compared with an "itinerant" electron model, offering insights into the magnetic structure of the material. The experimental setup and data analysis are detailed, showing a maximum spin-dependent absorption at 2 eV and a minimum at 7 eV, corresponding to a majority-spin and minority-spin band, respectively. The findings suggest that spin-dependent X-ray absorption can be a valuable tool for studying the magnetic properties of materials.