Figure 3
Spectra of X-ray polarization ellipticity. (a) and (b) are expansions of the squared regions in Figs. 2(b) and 2(c), respectively. The vertical bar drawn in (a) corresponds to a phase difference of polarization of 2π/1000 between the a and c axes. A signal observed at +2 eV from the cobalt K-absorption edge is evidently significant since a reversal of the signal is clearly observed when the helicity of the incident polarization is reversed. |