text: The interfacial Mn moments are ascribed to the prox- 
  imity polarization of the (Ga,Mn)As interface by the Fe 
  layer, such as was shown previously by XMCD as well as 
  ab initio theory7. Evidence for this can be observed from 
  measurement of the Mn L2,3 XMCD signal at tempera- 
  tures above the (Ga,Mn)As TC . Similar to the previous 
  study7, we observe a small but not negligible signal at 
  room temperature (Fig. 3), with opposite sign to the Fe 
  L2,3 XMCD. Its spectral shape is characteristic of a local- 
  ized electronic conﬁguration close to d5, similar to bulk 
  (Ga,Mn)As7,9,15 but in contrast to Mn in more metallic 
  7 or MnAs16. A slight 
  environments such as MnxFe1−x 
  broadening is observed on the low energy side of the Mn 
  L3 peak, which may be due to the diﬀerent screening in- 
  duced by proximity to the Fe layer. Since the measured 
  intensity is attenuated with distance z from the surface 
  as I = I0 exp(−z/λT EY ), the thickness of the strongly 
  coupled interface layer is estimated to be ∼0.7 nm or 2-3 