抄録
The relationship between the crystalline texture and the magnetic anisotropy in the Co-12Fe-3Nb alloy cold-rolled by 96% reduction in area was investigated through the measurements of X-ray pole figures, hysteresis-loops, and magnetic torque curves. The results obtained are summarised as follows:
(1) The magnetic anisotropy of this alloy is due to the magnetic crystal anisotropy (K1) and the induced magnetic anisotropy (Ku). The shape of hysteresis-loop depends on which anisotropy is prevailing; perminvar type for Ku>K1, constricted curve for Ku\fallingdotseqK1, and rectangular curve for Ku<K1.
(2) In the cold-rolled and annealed states, the direction of major easy magnetization is along the transverse direction.
(3) Upon annealing at temperatures above 700°C, the direction of hard magnetization changes to that of minor easy magnetization.
(4) The cold-rolling texture of this alloy is the “brass type” one, that is, (110)[\={1}12]. This texture persists up to 900°C. The (111) peak intensity in the X-ray pole figure increases gradually as the annealing temperature rises. Consequently, the value of apparent crystal anisotropy constant increases gradually up to 750°C. When the annealing temperature is over 750°C, the apparent crystal anisotropy constant is −8.3×105 erg/cc.
