Nd_2Fe_<14>B-α-Fe系ナノコンポジット薄膜の配向と磁気特性

概要

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Thin-film nanocomposite magnets composed of α-Fe-and c-axis-oriented Nd_2Fe_<14>B phases were synthesized by rf magnetron sputtering onto heated glass substrates.X-ray diffraction measurements showed the coexistence of (001)-textured Nd_2Fe_<14>B and randomly aligned α-Fe phases.Magnetization curves showed a single-phase-like behavior, and the values measured with fields applied perpendicular to the film plane were apparently larger than those measured with fields applied along the film plane.These results indicate the exchange coupling between the aligned Nd_2Fe_<14>B and α-Fe phases.As the volume fraction of the α-Fe phase increased from 7% to 40%, the saturation magnetization showed a monotonic increase, while the coercivity decreased from 6.2 to 1.7 kOe. These results were compared with the micromagnetic calculations and the experimental data for randomly oriented Nd_2Fe_<14>B-α-Fe films.
社団法人日本磁気学会の論文
2000-04-15