Cube Texture in Ultrathin Molybdenum Permalloy Tape

With identical annealing heat treatment, the role of the major annealed texture component seems to depend primarily upon the degree of cold reduction. Cube texture was evident when all three thicknesses of tape, $\frac{1}{2}\hspace{0.17em}\mathrm{mil}$ , $\frac{1}{4}\hspace{0.17em}\mathrm{mil}$ , and $\frac{1}{8}\hspace{0.17em}\mathrm{mil}$ , were annealed at 760°C. On raising the annealing temperature to 927°C, there was no trace of cube texture in tape which was cold reduced 96.9% before annealing. But cube texture still remained as the strongest annealing texture component in tapes similarly treated at 927%C but cold reduced only 93.8% and 87.5% respectively, before annealing. The present results agree to some extent, although not entirely, with previous investigators on the transitional nature of cube texture in materials similar to, but not the same as, the present tape. The switching coefficient $S_w$ increases with increasing cube pole concentration in the order of increasing thickness of tapes annealed at 760° and 927°C. Therefore, $\frac{1}{2}-\mathrm{mil}$ tape with the highest value of $S_w$ would have the longest switching time in μsec under a constant applied field. The squareness ratio of the hysteresis loop, $B_r{\mathrm{/B}}_m$ , at the applied field of $\frac{1}{2}\hspace{0.17em}\mathrm{oe}$ decreases with the increasing cube pole concentration in the order of increasing thickness of tapes annealed at 760° and 927°C. No correlation could be found between cube pole concentration in annealed tapes and observed coercive force.