Magnetic properties of amorphous Co-Gd-Mo-Ar thin films

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Abstract
The temperature dependences of the saturation magnetization of amorphous ferrimagnetic Co‐Gd‐Mo‐Ar thin films have been analyzed in terms of the mean‐field theory. This analysis yields the spin values of Co and the effective exchange interaction energies between Co‐Co and Co‐Gd atom pairs, which are then correlated with the film composition. Examples of the calculation of various magnetic properties from these mean‐field parameters are given. The magnitude of the anisotropy energy in these films depends both on the composition and on the fabrication parameters; the temperature dependence of the anisotropy energy can be described in terms of a dipolar model.