Optimum design consideration for interferometric spin wave logic operations

In the present study, the operational modes and the structural design are optimized to realize potential performance in the interferometric spin wave logic circuits. Successive functional operations, such as generation, propagation, and inductive detection of spin wave packets are numerically studied by using micromagnetic simulations. The logic input is coded with the phase of pulsed microwave currents applied through the generators. Among the various kinds of the investigated spin wave (SW) modes, the backward volume mode exhibits superior performance. Various structural and operational parameters, including the pulsed microwave frequency and the film thickness of the magnetic strip, were optimized by taking the inductive output voltage (V-out) as a quantitative criterion. The several orders of difference obtained in the V-out for the different logic inputs demonstrates the successful exclusive-not-OR operation. (C) 2011 American Institute of Physics. [doi: 10.1063/1.3549438]