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- W3147403939 abstract "The influence of quenching rate and nitrogenation in melt-spun Nd1.2Fe10.6Mo1.4 has been investigated in terms of microstructure, phase formation and magnetic properties. Increasing the quenching rate leads to smaller grain size. However, it also implies a change in the crystallized phase structure. We obtained a pure ThMn12 (1:12) structure at quenching rates up to 30 m/s, leading to an average grain size of 220 nm. Magnetic measurements of the as-spun ribbons revealed a reduction of the saturation magnetization for samples quenched above 30 m/s. This is attributed to the formation of a paramagnetic phase and/or magnetic phase with a Curie temperature (Tc) close to room temperature which is confirmed by 57Fe Mossbauer spectroscopy. The analysis of the spectra rules out the presence of a ferromagnetic TbCu7 (1:7) phase, which is usually reported in such system. The ribbons were nitrogenated in order to form the harder magnetic phase Nd1.2Fe10.6Mo1.4Nx. The ribbon quenched at 30 m/s with the pure ThMn12 nitride structure is the optimum sample for getting hard magnetic properties, with a coercivity of 0.6 T, saturation magnetization of 1.15 T and Curie temperature of 350 °C. Finally, we show the good stability of the later phase structure at elevated temperatures (< Tc), making this compound a good candidate for permanent magnet applications." @default.
- W3147403939 created "2021-04-13" @default.
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- W3147403939 date "2020-01-01" @default.
- W3147403939 modified "2023-10-17" @default.
- W3147403939 title "Structural and Magnetic Properties of Nd-Fe-Mo-(N) Melt-Spun Ribbons with Thmn12 Structure" @default.
- W3147403939 doi "https://doi.org/10.2139/ssrn.3532116" @default.
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