X-ray absorption fine-structure study on the Ni(OH)2 monolayer nanoclusters

Yuko Ichiyanagi; Hiroshi Kondoh; Toshihiko Yokoyama; Kaoru Okamoto; Kensuke Nagai; Toshiaki Ohta

doi:10.1016/j.cplett.2003.08.051

X-ray absorption fine-structure study on the Ni(OH)₂ monolayer nanoclusters

Yuko Ichiyanagi, Hiroshi Kondoh, Toshihiko Yokoyama, Kaoru Okamoto, Kensuke Nagai, Toshiaki Ohta

Research output: Contribution to journal › Article › peer-review

23 Citations (Scopus)

Abstract

The local structure around Ni ion for Ni(OH)₂ monolayer nanocluster (Ni-MNC) was studied by Ni K-edge X-ray absorption fine-structure spectroscopy (XAFS). XAFS analyses were consistent with the monolayer formation of the nanoclusters. We found that the Ni-Ni distance in the monolayer plane exhibits a significant contraction compared to that in bulk Ni(OH)₂, while the spacing between the Ni and O layers are rather expanded. Such a structural change is discussed in relation to the magnetic property of the Ni-MNC, which exhibits ferromagnetism below 10 K with a higher exchange interaction between the in-plane Ni atoms than that of the bulk Ni(OH) ₂.

Original language	English
Pages (from-to)	345-350
Number of pages	6
Journal	Chemical Physics Letters
Volume	379
Issue number	3-4
DOIs	https://doi.org/10.1016/j.cplett.2003.08.051
Publication status	Published - 2003 Sep 26
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy(all)
Physical and Theoretical Chemistry

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title = "X-ray absorption fine-structure study on the Ni(OH)2 monolayer nanoclusters",

abstract = "The local structure around Ni ion for Ni(OH)2 monolayer nanocluster (Ni-MNC) was studied by Ni K-edge X-ray absorption fine-structure spectroscopy (XAFS). XAFS analyses were consistent with the monolayer formation of the nanoclusters. We found that the Ni-Ni distance in the monolayer plane exhibits a significant contraction compared to that in bulk Ni(OH)2, while the spacing between the Ni and O layers are rather expanded. Such a structural change is discussed in relation to the magnetic property of the Ni-MNC, which exhibits ferromagnetism below 10 K with a higher exchange interaction between the in-plane Ni atoms than that of the bulk Ni(OH) 2.",

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AU - Ichiyanagi, Yuko

AU - Kondoh, Hiroshi

AU - Yokoyama, Toshihiko

AU - Okamoto, Kaoru

AU - Nagai, Kensuke

AU - Ohta, Toshiaki

PY - 2003/9/26

Y1 - 2003/9/26

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AB - The local structure around Ni ion for Ni(OH)2 monolayer nanocluster (Ni-MNC) was studied by Ni K-edge X-ray absorption fine-structure spectroscopy (XAFS). XAFS analyses were consistent with the monolayer formation of the nanoclusters. We found that the Ni-Ni distance in the monolayer plane exhibits a significant contraction compared to that in bulk Ni(OH)2, while the spacing between the Ni and O layers are rather expanded. Such a structural change is discussed in relation to the magnetic property of the Ni-MNC, which exhibits ferromagnetism below 10 K with a higher exchange interaction between the in-plane Ni atoms than that of the bulk Ni(OH) 2.

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