Fig. 7: Power dependence of the mode coupling.
The measured power of the magnetic tunnel junction, MTJ, emission at the gyrotropic frequency, Pgyro, as a function of the rf excitation frequency, fsource, and power passed across the field line antenna, Pantennarf, for a a sub-critical (IMTJ = 5 mA) and b a super-critical dc current applied to the MTJ (IMTJ = 8 mA) for an MTJ of diameter, d = 500 nm. The red and blue lines show the presence of modes with counter-clockwise (CCW) and clockwise (CW) sense of rotation of the spin-wave mode, respectively.
