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Mixed-valence state and structure changes of EuHx (x = 2 and 2 < x ≤ 3) under high-pressure H2 atmosphere
https://repo.qst.go.jp/records/81791
https://repo.qst.go.jp/records/817915cd3d771-fa06-4a9e-acaa-1feeae79cfd8
Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2020-11-25 | |||||
タイトル | ||||||
タイトル | Mixed-valence state and structure changes of EuHx (x = 2 and 2 < x ≤ 3) under high-pressure H2 atmosphere | |||||
言語 | ||||||
言語 | eng | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
資源タイプ | journal article | |||||
アクセス権 | ||||||
アクセス権 | metadata only access | |||||
アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
著者 |
Kuno, Keiji
× Kuno, Keiji× Matsuoka, Takahiro× Masuda, Ryo× Mitsui, Takaya× Seto, Makoto× Machida, Akihiko× Fujihisa, Hiroshi× Hirao, Naohisa× Ohishi, Yasuo× Shimizu, Katsuya× Sasaki, Shigeo× Takaya, Mitsui× Akihiko, Machida |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | Raman scattering, Mossbauer spectroscopy, and X-ray diffraction measurements have revealed that EuHx compressed in high-pressure hydrogen exhibits the crystal structure changes and the divalent (Eu2+) to trivalent (Eu3+) changes via two Eu2+/Eu3+ mixed-valence phases: EuHx-I (Pnma, x=2, Eu2+) to EuHx-II (P63/mmc, x=2, 7.0 GPa, Eu2+) to EuHx-III (I4/m, x~2.2, 7.0−9.0 GPa, Eu2+/Eu3+) to EuHx-V (x~2.8, 9.0−12.4 GPa, Eu2+/Eu3+) to EuHx-VI (x~3, 12.4−14.4 GPa, Eu3+) to EuHx-VII (x~3, 14.4−16 GPa, Eu3+) to EuHx-IV (I4/mmm, x~3, 16 GPa−, Eu3+). The EuHx-II transforms to EuHx-III at a constant pressure near 7.0 GPa due to the reaction with hydrogen. Our results also demonstrate that Mossbauer spectroscopy can be a useful marker to detect the hydrogen storing in metal hydrides. | |||||
書誌情報 |
Journal of Alloys and Compounds 巻 865, p. 158637, 発行日 2021-02 |
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出版者 | ||||||
出版者 | Elsevier | |||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 0925-8388 | |||||
DOI | ||||||
識別子タイプ | DOI | |||||
関連識別子 | 10.1016/j.jallcom.2021.158637 | |||||
関連サイト | ||||||
識別子タイプ | DOI | |||||
関連識別子 | https://doi.org/10.1016/j.jallcom.2021.158637 |