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- W2912286047 abstract "The purpose of this study was to construct structurally controlled Nd2Fe14B nanocomposite magnets with controlled magnetic properties. Block copolymer templates were used to chemically synthesize Nd2Fe14B nanocomposites. The Fe, Nd, and B precursors were introduced into a polystyrene-b-poly(2-vinylpyridine) template. After the block copolymer was oxidatively removed, the oxidized magnetic material was reduced with CaH2 and washed with water to remove residual Ca species. The nanostructures and magnetic properties of the resulting materials could be controlled by adjusting the atom percentages of Nd, Fe, and B in the raw materials. Neodymium-rich raw materials afforded a Nd2Fe14B/Nd nanocomposite that had a large coercivity and was composed of Nd2Fe14B surrounded by a nonmagnetic Nd phase, which weakened the magnetic coupling of Nd2Fe14B and impeded magnetic field inversion. In contrast, when the atom percentages of the three elements in the raw materials were nearly stoichiometric, a nanocomposite consisting mainly of Nd2Fe14B was obtained, and its saturation magnetization was 158 emu/g (94% of the theoretical value for Nd2Fe14B [169 emu/g])." @default.
- W2912286047 created "2019-02-21" @default.
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- W2912286047 date "2019-04-01" @default.
- W2912286047 modified "2023-10-18" @default.
- W2912286047 title "Use of block copolymer templates for chemical synthesis of Nd2Fe14B nanocomposites with controlled magnetic properties" @default.
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- W2912286047 doi "https://doi.org/10.1016/j.matchemphys.2019.01.073" @default.
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