ИСТИНА

X-ray absorption spectroscopy (EXAFS, XANES, and XMCD) at K and L2,3 edges of Fe as well as K edge of Al together with synchrotron-based diffraction has been applied to probe local rearrangements and related magnetic and electronic properties of Fe and Al atoms in bare Fe60Al40 thin films through the order-disorder (B2 → A2) phase transition. Distinct changes of Fe and Al coordination resulting in increased Fe 3d spin polarization and characteristic changes in electronic structure of Al due to disordering induced by 20 keV Ne+ ions of (0.75 - 6)×1014 ions·cm−2 fluences have been demonstrated. The preferential in-plane magnetic anisotropy and variations in coercivity fields depending on temperature and irradiation fluence has been found by element-specific hysteresis loops. An attempt to reduce the top oxide layer by an inductively coupled hydrogen plasma has shown that a use of the capping layer could further increase the macroscopic magnetization of films. A theory support was provided by self-consistent DFT calculations using VASP program package.