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Ce Substitution and Reduction Annealing Effects on Electronic States in Pr2−xCexCuO4 Studied by Cu K-edge X-ray Absorption Spectroscopy
https://repo.qst.go.jp/records/49165
https://repo.qst.go.jp/records/49165ca96904a-eb8a-4b75-84f7-abd21c7bb08a
| Item type | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2018-09-07 | |||||
| タイトル | ||||||
| タイトル | Ce Substitution and Reduction Annealing Effects on Electronic States in Pr2−xCexCuO4 Studied by Cu K-edge X-ray Absorption Spectroscopy | |||||
| 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 |
浅野, 駿
× 浅野, 駿× 石井, 賢司× 松村, 大樹× 辻, 卓也× 伊奈, 稔哲× 鈴木, 謙介× 藤田, 全基× 石井 賢司 |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | We investigated the Ce substitution and reduction annealing effects on the electronic states at copper sites by Cu Kedge X-ray absorption near-edge structure measurements in Pr2−xCexCuO4+α−δ (PCCO) with varying x and δ (amount of oxygen loss during annealing). Absorption near-edge spectra were modified by Ce substitution and reduction annealing similarly with increasing x and δ. Considering electron doping by Ce substitution, this similarity indicates an increase in electron number at the copper sites due to annealing (n_AN). Thus, the total number of electrons is determined by the amount of Ce and O ions. Furthermore, quantitative analyses of the spectra clarified that the number of Cu+ sites, corresponding to the induced electron number by Ce substitution (n_Ce) increases linearly with x in the as-sintered PCCO (δ = 0), whereas nAN is not exactly equal to 2δ, which is expected from charge neutrality. For each x-fixed sample, n_AN tends to exceed 2δ with increasing δ, suggesting the emergence of two types of carrier due to annealing. | |||||
| 書誌情報 |
Journal of the Physical Society of Japan 巻 87, 号 9, p. 094710, 発行日 2018-08 |
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| DOI | ||||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | 10.7566/JPSJ.87.094710 | |||||
| 関連サイト | ||||||
| 識別子タイプ | URI | |||||
| 関連識別子 | https://journals.jps.jp/doi/10.7566/JPSJ.87.094710 | |||||
| 関連名称 | https://journals.jps.jp/doi/10.7566/JPSJ.87.094710 | |||||
