Cu単結晶母相中のα-Fe粒子の成長に及ぼす外部磁場効果
1995 年 81 巻 6 号 p. 696-701
詳細
1995 年 81 巻 6 号 p. 696-701
The effects of magnetic field on the growth of ferromagnetic α-Fe precipitate particles in Cu-1.53mass% Fe alloy single crystals have been examined by the magnetic anisotropy measurement. Specimens aged at 973K for 24h were deformed in tension along the [419] direction to induce the γ→α martensitic transformation in dispersed small Fe precipitate particles. After deformation and successive annealing at 973K under the magnetic field of 1.25MA/m parallel to [110] and [116] for 30min8h, the magnetic anisotropy was examined by measuring magnetic torque around (331). The torque curves were analyzed theoretically by considering the crystal and shape magnetic anisotropies of the α-Fe particles. It is found that the elongation of α-Fe particles to the [110] direction by annealing is accelerated under the magnetic field parallel to [110] and restrained under the magnetic field parallel to [116]. These results can be understood by considering the magnetostatic stability of the a-Fe particles.
