Phase Stability of Ce-Substituted Magnetoplumbite-Type Sr Ferrite
| Autor: | Yoshikazu Tabata, Go Inoue, Takeshi Waki, Hiroyuki Nakamura |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
010302 applied physics
Diffraction Ionic radius Valence (chemistry) Materials science Analytical chemistry chemistry.chemical_element 01 natural sciences Oxygen Electronic Optical and Magnetic Materials Wavelength chemistry 0103 physical sciences Ferrite (magnet) Electrical and Electronic Engineering Solubility Ambient pressure |
| Zdroj: | IEEE Transactions on Magnetics. 56:1-4 |
| ISSN: | 1941-0069 0018-9464 |
| Popis: | 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- x Ce x Fe12O19 was estimated to be $x = 0.24$ at ambient pressure, which is reduced to 0.05–0.10 under higher oxygen pressures. The variation of the $c$ -axis against $x$ and 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. |
| Databáze: | OpenAIRE |
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