Effect of exchange coupling strength on magnetic and recording properties of SAF media

In this work, the effect of exchange coupling strength on magnetic and recording properties of synthetic anti-ferromagnetic (SAF) media is investigated. The coupling strength depends on the magnetization and thickness of the bottom layer. The magnetic reversal properties Mrt, Hcr and KuV/k/sub B/T were measured for both the top and bottom layers as a function of the bottom layer thickness. It was observed that with the increase in coupling constant J the thermal stability increases for both the top and bottom layers. The effect of increasing H/sub ex/ on the thermal stability and media noise is also reported.