Phase Stability of Ce-Substituted Magnetoplumbite-Type Sr Ferrite
Phase Stability of Ce-Substituted Magnetoplumbite-Type Sr Ferrite
复制标题
Ce取代磁铅石型锶铁氧体的相稳定性
DOI：
10.1109/tmag.2019.2961991
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发表时间：
2020
影响因子：
2.1
通讯作者：
Nakamura Hiroyuki
中科院分区：
文献类型：
--
作者：
Waki Takeshi;Inoue Go;Tabata Yoshikazu;Nakamura Hiroyuki
研究了不同氧压下Ce取代磁铅石型Sr铁氧体的相稳定性。我们已经成功地获得了Ce取代的样品，从X射线衍射和波长色散X射线分析显示。Ce在Sr_（1-x）Ce_xFe_（12）O_（19）中的溶解度极限被估计为超过环境压力，在更高的氧气压力下，其被降低到0.05-0.10。随着氧分压的增加，Ce的溶解度降低，Ce轴的变化表明Ce的价态不是4+，而是3+。Ce的溶解度极限不仅取决于离子半径，还取决于Ce的价态不稳定性。
We studied the phase stability of Ce-substituted magnetoplumbite-type Sr ferrite under various oxygen pressures. We have successfully obtained Ce-substituted samples as revealed from X-ray diffraction and wavelength dispersion X-ray analyses. The solubility limit of Ce in Sr1-xCexFe12O19 was estimated to beat ambient pressure, which is reduced to 0.05-0.10 under higher oxygen pressures. The variation of the-axis againstand the reduction of the solubility by increasing oxygen pressure suggests that the valence of Ce is not 4+ but 3+. The solubility limit of Ce is dominated not only by the ionic radius but also by the valence instability of Ce.