Full text loading...
(Color online) XRD patterns of CuFe1− x Ni x O2 normalized to the (012) peak. The labels are for the CuFeO2 delafossite phase. The peaks due to NiFe2O4 spinel impurity are identified.
(Color online) (a) Fe 2p 3/2 (L 3) XAS spectra of CuFe1− x Ni x O2. (b) Fe 2p 3/2 (L 3) XMCD spectra of CuFe1− x Ni x O2, compared to those of spinel NiFe2O4 and CuFe2O4. These two spectra are arbitrarily scaled.
(Color online) (a) Ni2p XMCD spectra of CuFe1− x Ni x O2, compared to that of spinel NiFe2O4, which is arbitrarily scaled. Inset: Ni2p XAS spectrum of CuFe0.97Ni0.03O2. (b) Comparison of Cu 2p XMCD and XAS spectra of CuFe0.97Ni0.03O2.
(Color online) (left) Intensity plots of Fe 2p XMCD spectra of CuFe1− x Ni x O2 as a function of x. For comparison, those of CuFe2O4 and NiFe2O4 are also provided. (right) Intensity plots of Cu 2p XAS and XMCD spectra of CuFe1− x Ni x O2 as a function of x. I(A)/I(B) denotes the intensity of the divalent Cu2+ peak with respect to that of the monovalent Cu+ peak in Cu 2p XAS. I(Δρ) denotes the peak-to-peak intensity of the Cu 2p XMCD spectrum (see Fig. 3).
Article metrics loading...