MAGNETIC-ANISOTROPY INDUCED BY MAGNETIC ANNEALING AND COLD ROLLING FOR CO AND CO-NI ALLOYS .1. EXPERIMENTAL

The uniaxial magnetic anisotropies, Kuf, induced by magnetic annealing and Kur by cold rolling were investigated for Co and Co-Ni alloys containing Ni up to 30%. The values of Kuf obtained for Co-Ni alloys ranged from -4 to 8×105 erg/cm3 in fairly good agreement with the earlier results. The obtained values of Kur are about -2×105 erg/cm3 for any composition of alloys. The pole figure analysis by the Schulz's reflection method with X-ray was carried out. The results revealed no texture for the magnetically annealed specimens. Contrary, for the cold rolled specimens, the crystallographic texture was detected, even though the magnitude of Kur is smaller than that of Kuf. Influence of annealing on Kuf and Kur was examined in the range of temperature between 300 and 1000°C. By the annealing above the phase transformation temperature the value of Kur is reduced suddenly, while the value of Kuf remains unchanged. © 1979, THE PHYSICAL SOCIETY OF JAPAN. All rights reserved.