Abstract
The effects of third elements on the magnetic uniaxial anisotropy of sputtered GdCo films were studied. The magnetic anisotropy induced by bias sputtering is explained from the anisotropic distribution of Co–Co pairs produced by environment-dependent resputtering. It is concluded that the rapid decrease of the positive uniaxial anisotropy on doping with Mo arises from the low resputtering yield of Mo. The thermal stability of the anisotropy of GdCoMo is also related to the low resputtering yield of Mo. Since Cu atoms as well as Gd are easily resputtered in the bias sputtering of GdCoCu films, the anisotropy of GdCoCu is larger than that of GdCoMo and changes greatly on annealing. It is shown that the magnetic anisotropy of the ternary alloy system GdCoM strongly depends on the resputtering probability of the third element M.
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