Variation of XMCD spectrum with temperature at R L_2,3-edges in R₃Fe₅O₁₂ (R = Gd and Er)

The variation of X-ray magnetic circular dichroism (XMCD) with temperature has been measured at R L_2,3-edges in R₃Fe₅O₁₂ (R = Gd and Er). A drastic change in the spectral profile has been observed at low temperatures. The variation of XMCD peak intensity, corrected by the contribution of Fe with temperature, is in agreement with the magnetization of R sublattice. The results suggest that Fe 3d polarization plays an important role to produce the R L_2,3-edges XMCD spectrum.