X-ray nanospectroscopic characterization of a molecularly thin ferromagnetic Ti1-x Cox O2 nanosheet

Yoshinori Kotani, Toshiyuki Taniuchi, Minoru Osada, Takayoshi Sasaki, Masato Kotsugi, F. Z. Guo, Yoshio Watanabe, Masato Kubota, Kanta Ono

Research output: Contribution to journalArticle

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Abstract

We investigated the local electronic structures of a molecularly thin ferromagnetic Ti0.8 Co0.2 O2 nanosheet by means of x-ray nanospectroscopy with spectroscopic photoemission and low energy electron microscopy. By analyzing the Co 2p x-ray absorption and photoemission spectra, the chemical state of doped Co ions in individual Ti0.8 Co0.2 O2 nanosheet was found to be Co2+ low-spin state, which is consistent with previous magnetization data and first-principles calculation [M. Osada, Phys. Rev. B 73, 153301 (2006)]. Furthermore, we employed photoelectron emission microscopy to image the variation in chemical states in Ti0.8 Co0.2 O2 nanosheets with different stacking structures and clarified the identical Co2+ low-spin state in monolayer and overlapped cases.

Original languageEnglish
Article number093112
JournalApplied Physics Letters
Volume93
Issue number9
DOIs
Publication statusPublished - 2008
Externally publishedYes

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photoelectric emission
x ray spectra
x ray absorption
electron microscopy
photoelectrons
x rays
electronic structure
microscopy
absorption spectra
magnetization
ions
energy

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Kotani, Y., Taniuchi, T., Osada, M., Sasaki, T., Kotsugi, M., Guo, F. Z., ... Ono, K. (2008). X-ray nanospectroscopic characterization of a molecularly thin ferromagnetic Ti1-x Cox O2 nanosheet. Applied Physics Letters, 93(9), [093112]. https://doi.org/10.1063/1.2976550

X-ray nanospectroscopic characterization of a molecularly thin ferromagnetic Ti1-x Cox O2 nanosheet. / Kotani, Yoshinori; Taniuchi, Toshiyuki; Osada, Minoru; Sasaki, Takayoshi; Kotsugi, Masato; Guo, F. Z.; Watanabe, Yoshio; Kubota, Masato; Ono, Kanta.

In: Applied Physics Letters, Vol. 93, No. 9, 093112, 2008.

Research output: Contribution to journalArticle

Kotani, Y, Taniuchi, T, Osada, M, Sasaki, T, Kotsugi, M, Guo, FZ, Watanabe, Y, Kubota, M & Ono, K 2008, 'X-ray nanospectroscopic characterization of a molecularly thin ferromagnetic Ti1-x Cox O2 nanosheet', Applied Physics Letters, vol. 93, no. 9, 093112. https://doi.org/10.1063/1.2976550
Kotani, Yoshinori ; Taniuchi, Toshiyuki ; Osada, Minoru ; Sasaki, Takayoshi ; Kotsugi, Masato ; Guo, F. Z. ; Watanabe, Yoshio ; Kubota, Masato ; Ono, Kanta. / X-ray nanospectroscopic characterization of a molecularly thin ferromagnetic Ti1-x Cox O2 nanosheet. In: Applied Physics Letters. 2008 ; Vol. 93, No. 9.
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AU - Kotsugi, Masato

AU - Guo, F. Z.

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