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Title: (61)Ni synchrotron radiation-based Mössbauer spectroscopy of nickel-based nanoparticles with hexagonal structure.
Authors: Masuda, Ryo
Kobayashi, Yasuhiro  kyouindb  KAKEN_id
Kitao, Shinji
Kurokuzu, Masayuki
Saito, Makina  kyouindb  KAKEN_id
Yoda, Yoshitaka
Mitsui, Takaya
Hosoi, Kohei
Kobayashi, Hirokazu
Kitagawa, Hiroshi  kyouindb  KAKEN_id  orcid https://orcid.org/0000-0002-9307-7079 (unconfirmed)
Seto, Makoto  kyouindb  KAKEN_id
Author's alias: 増田, 亮
小林, 康浩
北尾, 真司
黒葛, 真行
齋藤, 真器名
依田, 芳卓
三井, 隆也
細井, 浩平
小林, 浩和
北川, 宏
瀬戸, 誠
Issue Date: 17-Feb-2016
Publisher: Nature Publishing Group
Journal title: Scientific reports
Volume: 6
Thesis number: 20861
Abstract: We measured the synchrotron-radiation (SR)-based Mössbauer spectra of Ni-based nanoparticles with a hexagonal structure that were synthesised by chemical reduction. To obtain Mössbauer spectra of the nanoparticles without (61)Ni enrichment, we developed a measurement system for (61)Ni SR-based Mössbauer absorption spectroscopy without X-ray windows between the (61)Ni84V16 standard energy alloy and detector. The counting rate of the (61)Ni nuclear resonant scattering in the system was enhanced by the detection of internal conversion electrons and the close proximity between the energy standard and the detector. The spectrum measured at 4 K revealed the internal magnetic field of the nanoparticles was 3.4 ± 0.9 T, corresponding to a Ni atomic magnetic moment of 0.3 Bohr magneton. This differs from the value of Ni3C and the theoretically predicted value of hexagonal-close-packed (hcp)-Ni and suggested the nanoparticle possessed intermediate carbon content between hcp-Ni and Ni3C of approximately 10 atomic % of Ni. The improved (61)Ni Mössbauer absorption measurement system is also applicable to various Ni materials without (61)Ni enrichment, such as Ni hydride nanoparticles.
Description: ニッケルナノ粒子の放射光メスバウアー吸収分光測定に成功 --先端ナノ材料の機能発現メカニズムの解明に期待--. 京都大学プレスリリース. 2016-02-18.
Rights: This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
URI: http://hdl.handle.net/2433/204598
DOI(Published Version): 10.1038/srep20861
PubMed ID: 26883185
Related Link: http://www.kyoto-u.ac.jp/ja/research/research_results/2015/160217_3.html
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