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We have reported the fabrication of MgO core/SnO_2 shell nanowires, by a two-step evaporation process. Thermal annealing induced changes in morphology, in which the nanowire surface became rough by the agglomeration of SnO_2 shell layers and its crystallinity was enhanced. It was found that three fundamental modes (475, 634, 772 cm^{-1}) and an infrared (IR)-active mode (682 cm^{-1}) of rutile SnO_2...
Three kinds of commercial Nd-Fe-B based materials were compared using ^{57}Fe Mössbauer spectroscopy and X-ray analysis: near the Nd_2Fe_{14}B stoichiometry and with both lowered and raised Nd content. Magnetically hard Nd_2Fe_{14}B is present in all three materials. In the Nd-low material it is accompanied with the magnetically soft Fe_3B phase, building the nanocomposite structure. In the Nd-rich...
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