MAGNETIC DICHROISM UNDER EXCITATION BY UNPOLARIZED RADIATION

Magnetic dichroism has been observed in the angular distribution of p- core level photoemission spectra excited from crystalline ferromagnets by unpolarized X-rays. The angular dependence of the angular and ener gy-resolved photoemission intensity was recorded as a function of the emission direction with respect to the crystal, revealing a strong var iation of the magnetic dichroism with emission angle due to photoelect ron diffraction. This variation is particularly strong around the forw ard scattering peaks, including sign reversals close to these directio ns. The results demonstrate that any standard X-ray photoelectron spec troscopy apparatus possesses the potential for combined analysis of su rface magnetic structure and geometric structure in a chemically speci fic way.