Element-specific soft x-ray magneto-optic rotation studies of magnetic films and multilayers

摘要

Tunable multilayer linear polarizers extend magneto-optic rotation techniques that directly sense polarization changes into the 50--1,000 eV range. The resonant response at atomic core levels yields element-specific magnetic signals that can be much larger than the analogous signal in the visible. A tunable multilayer polarimeter is described, and examples of its use in early Kerr rotation hysteresis studies of Fe films and Fe/Cr multilayers are given.