Abstract
In order to control the exchange coupling between the grains in a perpendicular recording media, a simple method is to totally decouple the grains using a thick oxide and apply a continuous magnetic capping layer to improve the uniformity of the coupling. In this paper, a system of CoPt grains coupled with a Co layer is investigated using an atomistic spin model. We show that the exchange coupling between the CoPt grains and the Co layer has an impact on the reversal process of the grains, as well as causing a reduction in the coercivity of the whole system. Further, we have studied the coercivity of the whole system as a function of the exchange coupling parameter between the grains and the exchange layer, and have found a sharp decrease in the coercivity. The coercivity as a function of the exchange layer thickness is also studied for different exchange coupling parameters.
| Original language | English |
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| Article number | 07B752 |
| Pages (from-to) | 07B752 |
| Journal | Journal of Applied Physics |
| Volume | 109 |
| Issue number | 7 |
| DOIs | |
| Publication status | Published - 1 Apr 2011 |