Abstract
Intrinsic grain size, its distribution and magnetic properties due to the addition of B on CoCrPtB recording magnetic layer are studied for various B compositions (0–10 at. %). CoCrPtB films were grown on large CrMo grains with an average grain size of ∼27 nm in order to obtain the intrinsic grain structure of the B containing magnetic layer, maintaining good Co (1120) crystallographic texture. Remarkable reduction in average intrinsic grain diameter is observed from ∼24 to ∼6.9 nm as the B concentration was varied from 0 to 10 at. %, respectively, on CoCrPt. The presence of B both within and outside the ferromagnetic phase is suggested to explain the observed coercivity dependence in CoCrPtB systems.
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