Exchange Coupled Bit Patterned Media Under the Influence of RF-Field Pulses

In this work, we have studied the switching of single phase material and exchange spring bit patterned islands under the influence of a microwave field. Micromagnetic simulations shows that the reduction of the switching field owing to a microwave assist field is most effective for an optimal value of the Gilbert damping constant of 0.05. The microwave assist field changes the angle dependence of the switching field. With increasing field angle the switching field can be reduced to 25% of the switching field at zero field angle.