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Phase separation in thermoelectric delafossite CuFe1− x Ni x O2 observed by soft x-ray magnetic circular dichroism
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10.1063/1.3609248
/content/aip/journal/apl/99/1/10.1063/1.3609248
http://aip.metastore.ingenta.com/content/aip/journal/apl/99/1/10.1063/1.3609248
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Figures

Image of FIG. 1.
FIG. 1.

(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.

Image of FIG. 2.
FIG. 2.

(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.

Image of FIG. 3.
FIG. 3.

(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.

Image of FIG. 4.
FIG. 4.

(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. Iρ) denotes the peak-to-peak intensity of the Cu 2p XMCD spectrum (see Fig. 3).

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/content/aip/journal/apl/99/1/10.1063/1.3609248
2011-07-07
2014-04-23
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Phase separation in thermoelectric delafossite CuFe1−xNixO2 observed by soft x-ray magnetic circular dichroism
http://aip.metastore.ingenta.com/content/aip/journal/apl/99/1/10.1063/1.3609248
10.1063/1.3609248
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