Intergrowth between the Oxynitride Perovskite SrTaO2N and the Ruddlesden–Popper Phase Sr2TaO3N
| Autor: | Yuji Masubuchi, Shinichi Kikkawa, Yuya Suemoto, Atsuo Matsutani, Yuki Nagamine, Yamazaki Kumiko, Takeshi Shibahara |
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| Rok vydání: | 2018 |
| Předmět: |
Oxide
Tantalum chemistry.chemical_element 02 engineering and technology Crystal structure engineering.material 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Inorganic Chemistry Crystallography chemistry.chemical_compound Ruddlesden-Popper phase chemistry Phase (matter) Scanning transmission electron microscopy engineering Atomic ratio Physical and Theoretical Chemistry 0210 nano-technology Perovskite (structure) |
| Zdroj: | Inorganic Chemistry. 57:9086-9095 |
| ISSN: | 1520-510X 0020-1669 |
| DOI: | 10.1021/acs.inorgchem.8b01079 |
| Popis: | Strontium tantalum oxynitrides were prepared within the nominal composition range of 1.0 ≤ x ≤ 2.0, where x = Sr/Ta atomic ratio. A gradual structural transition was observed between the perovskite SrTaO2N and the Ruddlesden–Popper phase Sr2TaO3N with increasing SrO content. X-ray diffraction analyses showed that a single-phase perovskite was obtained up to x = 1.1, after which Sr2TaO3N gradually appeared at x ≥ 1.25. High-resolution scanning transmission electron microscopy observations identified the gradual intergrowth of a Ruddlesden–Popper Sr2TaO3N type planar structure interwoven with the perovskite crystal lattice upon increasing x. The crystal lattice at x = 1.4 was highly defective and consisted primarily of perovskite intergrown with a large amount of the Ruddlesden–Popper phase structure. This Ruddlesden–Popper phase layer intergrowth is a characteristic of an oxynitride perovskite rather than the Ruddlesden–Popper defects previously reported in oxide perovskites. Partial substitution of Ta wit... |
| Databáze: | OpenAIRE |
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