Figure 3
The TMRs of a series of pMTJs with (a) d1 = 0.7 nm, d2 = 1.18 nm; (b) d1 = 3 nm, d2 = 3 nm; (c) d1 = 20 nm, d2 = 10 nm; after being annealed at 300 °C for 10 min. (d) Ferromagnetic resonance (FMR) measurements in Nb-pMTJs with FMR frequencies between 27 and 32 GHz. (e) The fitting of the FMR frequency \(f\) versus frequency-dependent resonance field \(\mu_{0} H_{res}\). (f) The fitting of the linewidth \(\mu_{0} {\Delta }H\) versus the FMR frequency \(f\).
