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• W3203945330 abstract "Dilute magnetic semiconductors (DMSs), such as (In, Mn)As and (Ga, Mn)As prototypes, are limited to III-V semiconductors with Curie temperatures (Tc) far from room temperature, thereby hindering their wide application. Here, one kind of DMS based on perovskite niobates is reported. BaM x Nb(1-x)O3-δ (M = Fe, Co) powders are prepared by the composite-hydroxide-mediated method. The addition of M elements endows BaM x Nb(1-x)O3-δ with local ferromagnetism. The tetragonal BaCo x Nb(1-x)O3-δ nanocrystals can be obtained by Co doping, which shows strong saturation magnetization (Msat) of 2.22 emu g-1, a remnant magnetization (Mr) of 0.084 emu g-1 and a small coercive field (Hc) of 167.02 Oe at room temperature. The ab initio calculations indicate that Co doping could lead to a 64% local spin polarization at the Fermi level (EF) with net spin DOS of 0.89 electrons eV-1, this result shows the possibility of maintaining strong ferromagnetism at room temperature. In addition, the trade-off effect between the defect band absorption and ferromagnetic properties of BaM x Nb(1-x)O3-δ is verified experimentally and theoretically." @default.
• W3203945330 created "2021-10-11" @default.
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• W3203945330 date "2021-10-01" @default.
• W3203945330 modified "2023-10-16" @default.
• W3203945330 title "Increased room temperature ferromagnetism in Co-doped tetrahedral perovskite niobates" @default.
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• W3203945330 doi "https://doi.org/10.1098/rsos.210121" @default.
• W3203945330 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/8493198" @default.
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