Figure 3: Microwave power dependence of the Rabi frequency.
From: Ensemble-averaged Rabi oscillations in a ferromagnetic CoFeB film
(a–c) Temporal responses for the CoFeB sample for microwave field amplitudes of 7.5 mT (a), 1.3 mT (b) and 0.25 mT (c). Responses were measured at a frequency of 10 GHz and μ0H0=446 mT. The envelopes (red dashed lines) exhibit a similar temporal form independent of the microwave amplitude. (d–f) Temporal responses of a 4 nm-thick molecular beam epitaxy (MBE) grown single-crystal Fe sample at microwave field amplitudes of 7.5 mT (d), 4.7 mT (e) and 2.3 mT (f). Responses were measured at a frequency of 12 GHz and μ0H0=143 mT. In contrast to the sputter deposited CoFeB film, the envelope exhibits a clear dependence on the microwave amplitude. Measurements in a–f were carried out at the resonance conditions. Guiding dashed lines indicate the envelopes.
