Tribo-magnetics and nanometer spaced head-disk systems

Up to now, the head-disk spacing is the main parameter used to link the magnetic performance with mechanical head-disk interface. However, as the mean head-disk spacing goes to 5-10 nanometer level, the relationship between mechanical interface/interaction and magnetic head-disk interface/interaction is not only writing field or reading sensitivity but other factors induced by mechanical interaction as well, such as magnetic signal decay, thermal asperity, and even data erasure.