Abstract

Cobalt films exhibiting a six‐fold magnetic symmetry have been grown by vacuum deposition onto (111) faces of copper single crystals. Anisotropy energies were determined by Fourier analysis of planar torque curves. Cobalt films of 2750 A, 820 A and 2100 A had cubic anisotropy constants, K2, of −7.3 × 104 erg/cc, −1.6 × 104 erg/cc and −7.7 × 103 erg/cc respectively. Uniaxial anisotropy was present and the constant, Ku, was approximately equal to 104 erg/cc in these films. Alloy films of Co −6% Fe were also grown on (111) copper single crystal faces. These films exhibited uniaxial anisotropy only with Ku ≈2 × 104 erg/cc. In both pure and alloyed cobalt, the uniaxial axis was unrelated to substrate orientation.

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