RESONANT MAGNETIC SCATTERING OF POLARIZED SOFT X-RAYS - SPECULAR REFLECTIVITY AND BRAGG-DIFFRACTION FROM MULTILAYERS

We have measured resonant magnetic scattering of elliptically polarize d soft x rays from magnetically ordered Fe/Co multilayers, tuning the photon energy across the 2p edges of Fe and Co. Specular reflectivity was measured for a series of angles of incidence as a function of the photon energy. Bragg diffraction was measured performing theta/2 theta scans for several photon energies. In both cases, large magnetic sign als were observed, up to 20% peak to peak in the asymmetry ratio. An e stimate of the variation of the real part of the refractive index thro ugh the Fe L-3 edge is derived from the Bragg peak displacement versus energy.