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Journal Articles

Temperature and polarization dependence of Fe L $_{3}$ -edge X-ray absorption spectra of LuFe $_{2}$ O $_{4}$

Agui, Akane; Mizumaki, Masaichiro*; Kuroda, Tomoko*; Kawai, Masahiro*; Nagata, Tomoko*; Ikeda, Naoshi*; Uozumi, Takayuki*

Journal of Electron Spectroscopy and Related Phenomena, 197, p.13 - 16, 2014/12

https://doi.org/10.1016/j.elspec.2014.08.008

Times Cited Count：4 Percentile：24.63(Spectroscopy)

In this paper, we report on the study of the temperature dependence of Fe L $_{3}$ -edge X-ray absorption spectra (XAS) of LuFe $_{2}$ O $_{4}$ . In the charge ordered state the valence of Fe is in Fe $^{2+}$ and Fe $^{3+}$ . And the Fe L $_{3}$ -edge XAS spectra have double peak structure which is attributed the Fe $^{2+}$ and Fe $^{3+}$ state. In high temperature, the double peak structure becomes indistinct because the thermal excited state overlaps while the Fe valence keeping the integer number.

Oral presentation

Temperature dependence of Fe2p-edge XES of LuFe $_{2}$ O $_{4}$ , 2

Agui, Akane; Kawai, Masahiro*; Nagata, Tomoko*; Mizumaki, Masaichiro*; Izumi, Yudai*; Ikeda, Naoshi*

no journal, ,

no abstracts in English

Oral presentation

The Non-local emission process among Fe $^{2+}$ and Fe $^{3+}$ in LuFeO

Agui, Akane; Kawai, Masahiro*; Nagata, Tomoko*; Mizumaki, Masaichiro*; Ikeda, Naoshi*

no journal, ,

We have measured the resonant Fe L2,3 emission spectra of LuFeO. The charge order temperature is Tco = 320 K and the $^{2+}$ and $^{3+}$ arrange alternately in the charge ordered phase. We found that the spectrum at T Tco could not be explained only by the simple sum of spectra from the $_{2+}$ and $_{3+}$ sites. We assumed that when an Fe 2p state was excited, the electron transited not only to the on-state Fe 3d state but also to the neighboring Fe 3d state. This intermediate interference made the new spectra shape.