Small magnetic domains ͑70 nm͒ have been observed by magnetic force microscopy in ordered FePd thin films grown by molecular-beam epitaxy. The layers exhibit a perpendicular magnetic anisotropy induced by uniaxial L1 0 ͓CuAu͑I͒-type͔ chemical ordering. The magnetization curves show that the easy magnetization axis is perpendicular to the film plane and their interpretation with a micromagnetic model leads to the correct size of the domains.

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