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We put forward a method for achieving fast and robust for magnetizationreversal in a nanomagnet, by combining the inverse engineering and compositepulses. The magnetic fields, generated by microwave with time-dependentfrequency, are first designed inversely within short operation time, andcomposite pulses are further incorporated to improve the fidelity throughreducing the effect of magnetic anisotropy. The high-fidelity magnetizationreversals are illustrated with numerical examples, and visualized on Blochsphere. The influence of damping parameters, relevant to the pulse sequence, isfinally discussed based on Landau-Lifshitz-Gilber equation. These results pavethe way for precise but fast magnetization reversal or switching, with theapplications in high density information storage and processing.

Inverse engineering and composite pulses for magnetization reversal