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- W4313594517 abstract "Perovskites usually have random distribution of cations at corresponding A and B positions or double A-site or B-site cation orderings. In this work, we could achieve triple A-site ordering through a combination of particular cations: Dy, Mn, and Zn. Dy2MnZnMn4−xTixO12 perovskites with x = 1 and 2, belonging to a family of A-site columnar-ordered A2A′A″B4O12 quadruple perovskites, were synthesized by a high-pressure, high-temperature method at 6 GPa and about 1700 K. Samples with x = 0 and 3 consisted of mixtures of other phases. The crystal structures of the x = 1 and 2 samples were investigated by powder synchrotron X-ray diffraction. A nearly perfect triple A-site cation ordering was realized in the x = 1 sample, where Dy3+ cations were located in 10-fold-coordinated A sites, Mn3+ cations were located in a square-planar A′ site, and Zn2+ cations were located in a tetrahedral A″ site. On the other hand, some degrees of antisite disorder took place in the x = 2 sample. Both compounds crystallize in space group P42/nmc (No. 137) at room temperature with a = 7.37838 Å and c = 7.81438 Å (x = 1) and a = 7.49153 Å and c = 7.68402 Å (x = 2). Both compounds exhibit a ferrimagnetic order at TC = 26 K (x = 1) and TC = 41 K (x = 2). TC of the x = 2 sample is higher than that of the x = 1 sample despite a larger amount of non-magnetic Ti4+ cations and some degrees of antisite disorder. The magnetization at 5 K and 70 kOe for polycrystalline samples reached values of about 11.7μB for the x = 1 sample and about 11.1μB for the x = 2 sample." @default.
- W4313594517 created "2023-01-06" @default.
- W4313594517 creator A5004388942 @default.
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- W4313594517 date "2023-05-01" @default.
- W4313594517 modified "2023-09-27" @default.
- W4313594517 title "Realization of triple A-site cation ordering through the Dy/Mn/Zn combination in the ferrimagnetic Dy2MnZnMn4−Ti O12 perovskites" @default.
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- W4313594517 doi "https://doi.org/10.1016/j.ceramint.2023.01.019" @default.
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