Abstract
Current generation CoCrPt oxide based perpendicular magnetic recording media use two Ru-based intermediate layers in order to grow crystallographically textured, and magnetically isolated granular media. In this work, the advantage of replacing the Ru grain isolation layer with antiferromagnetic IrMn is demonstrated. Media samples using 7.5nm thick IrMn intermediate layers show perpendicular texture with dispersion below 4°, coercivity of over 4000Oe alongside magnetic exchange decoupling, average grain sizes of 6nm with distributions under 14%, and thermal stability factor of 88. The IrMn layer may also help to stabilize the recording layer grains against thermal instability effects.
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