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. Author manuscript; available in PMC: 2014 Sep 3.
Published in final edited form as: Nat Commun. 2014 Mar 3;5:3404. doi: 10.1038/ncomms4404

Figure 5. XMCD for opposite BaTiO3 ferroelectric polarization.

Figure 5

(a,c) [d,f] XAS Fe-L2,3 spectra taken at room temperature on Au/Co/Fe(2ML)/BTO/LSMO//STO capacitors with A1 = 0.02 mm2 area at 300 K [A2 = 1 mm2, at 80 K] after polarization of BTO with V+ = +5V (E = +170 kVcm−1) (Pup) and V = −5V (Pdn) respectively. Insets in (a) and (c) are visual schemes of the Fe/BTO interface for Pup and Pdn: white vertical arrows correspond to BTO polarization direction, while M and MOx indicate the net magnetization in metallic Fe and in the FeOx layer at the Fe/BTO interface. Insets in d) and f) are zooms of the Fe-L3 energy region. (b,e) XMCD signal in the Fe-L3 energy region for BTO polarization Pup (blue circles) or Pdn (red squares) taken on capacitors with area A1 at 300 K and area A2 at 80K, respectively. The yellow shading indicates the region of the spectra corresponding to the oxidized Fe layer in contact with BTO.