Figure 3

(a) \({H}_{{\rm{sw}}}\) versus \({f}_{{\rm{rf}}}\) in the circularly polarized microwave field from CPWs 1 and 2 for several \({H}_{{\rm{rf}}}\) values. The inset shows a waveform of signals with 1-ns rise/fall time and 5-ns plateau time measured at the cable end connected to the CPWs. (b) \({H}_{{\rm{sw}}}\) versus delay phase of the signal in CPW 2 with respect to that in CPW 1 for \({f}_{{\rm{rf}}}\,=\,18\) GHz and \({H}_{{\rm{rf}}}=205\) Oe. Schematics at the top depict polarization of the generated microwave field. Two curves correspond to the cases in which the nanomagnet reverses from the \(-z\) to \(+z\) directions and from the \(+z\) to \(-z\) directions, respectively.