頁籤選單縮合
題 名 | Induced Chemical Pressure by O Vacancies in (Tb₁₋xNax)MnO₃ |
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作 者 | Chan, T. S.; Liu, R. S.; Lien, Y. H.; Huang, C. Y.; Hu, S. F.; Chen, J. M.; Lee, J.-F.; Karppinen, M.; Yamauchi, H.; | 書刊名 | Chinese Journal of Physics |
卷 期 | 45:2(2) 2007.04[民96.04] |
頁 次 | 頁256-262 |
分類號 | 337.472 |
關鍵詞 | |
語 文 | 英文(English) |
英文摘要 | The crystal structure and magnetic properties of perovskite-related (Tb₁₋xNax)MnO₃₋y compounds in the compositional range 0 ≤ x ≤ 0.3 are reported. We found that the effective moments decrease with increasing Na content, which is due to weaken the rare-earth interaction and dilute average rare-earth moment in each unit cell. Moreover, a decrease of unit cell volume with Na-doping is also observed resulting from an increase in the oxygen vacancies. The result is supported by the X-ray absorption near-edge structure (XANES) spectra and the closed-ampoule iodometry technique. |
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