Investigation into the impact of grain-size and grain-size variation on system level error rates

Grain size and grain-size distributions are two parameters that play critical roles in the performance of magnetic recording media, in determining the densities that they support. Smaller magnetically isolated grains lead to less jitter noise, thereby leading to lower BER´s and higher areal densities. Similarly, a smaller grain-size distribution indicates fewer larger and smaller grains again leading to less jitter noise and higher areal densities. In this paper, we study the impact of these two geometrical parameters on the system-level performance, holding all other magnetic parameters constant.