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Magnetic and spin transitions in wüstite: A synchrotron Mössbauer spectroscopic study
https://repo.qst.go.jp/records/47980
https://repo.qst.go.jp/records/479809df585a9-b291-4de5-bcb6-245524be3e04
| Item type | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2017-05-23 | |||||
| タイトル | ||||||
| タイトル | Magnetic and spin transitions in wüstite: A synchrotron Mössbauer spectroscopic study | |||||
| 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 |
Hamada, Maki
× Hamada, Maki× Kamada, Seiji× Ohtani, Eiji× Mitsui, Takaya× Masuda, Ryo× Sakamaki, Tatsuya× Suzuki, Nanami× Maeda, Fumiya× Akasaka, Masahide× 三井 隆也 |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | This is a Mossbauer study of wustite at pressures above 200 GPa using synchrotron Mossbauer spectroscopy. Synthetic Fe 0.96 O-wustite was investigated at 91(2), 95(4), 109(2), 114.5(3), 131.1(7), 133.2(2), 155(2), 167(2), 193(2) and 203(1) GPa at 300 K at the SPring-8 BL11XU beamline. The Mossbauer spectrum at 91 GPa consists of both magnetic and nonmagnetic components. The magnetic high-spin component decreases gradually with increasing pressure from 91 to 203 GPa, while the nonmagnetic low-spin component increases with pressure in the same pressure range. The result suggests that the spin state of Fe in the outer core at pressures above 203 GPa is the low-spin state. If oxygen exists in the core, the low-spin Fe-O bonding is shorter than high-spin Fe-O bonding, suggesting dense Fe-O liquid in the Earth’s outer core. The gradual increase of the density of the metallic liquid with depth by the spin transition of Fe-O bonding in the shallow outer core region will stabilize the outer core against thermal convection. |
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| 書誌情報 |
Physical Review B 巻 93, p. 155165-1-155165-6, 発行日 2016-04 |
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| 出版者 | ||||||
| 出版者 | アメリカ物理学会 | |||||
| DOI | ||||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | 10.1103/PhysRevB.93.155165 | |||||
| 関連サイト | ||||||
| 識別子タイプ | URI | |||||
| 関連識別子 | http://journals.aps.org/prb/abstract/10.1103/PhysRevB.93.155165 | |||||
| 関連名称 | http://journals.aps.org/prb/abstract/10.1103/PhysRevB.93.155165 | |||||
