Abstract
Domain walls in magnetic thin films occurring at the interfaces of grains with different magnetic orientations can significantly influence the electronic properties of magnetic multilayers. We investigate the energy of formation of domain walls and their magnetic structure in systems with large magneto-crystalline anisotropy making use of the fully relativistic, spin-polarized screened Korringa–Kohn–Rostoker Green's functions technique for layered systems. Results are presented for Pt(001)/T/Pt(001), with T = Co, Co80Pt20. The calculated dependence of the formation energy on the domain wall width agrees with the predictions from the phenomenological Ginzburg–Landau theory. However, the ab initio calculations allow for a detailed layer resolved study of the domain wall formation. We observed that domain walls in Co80Pt20 can be easier formed as in pure Co, but the energy saved than compared to a direct flip of the magnetic orientation in one domain is smaller for the alloyed system.
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