Fig. 5: Tunability of critical distance.
From: Nonlinear dynamics of directly coupled skyrmions in ferrimagnetic spin torque nano-oscillators
a The critical distance \({d}_{12}^{* }\) as a function of the current density j1 (with fixed magnetization \({M}_{{{{\rm{s}}}}}^{{{{\rm{t}}}}}=600\) kA m−1) and b its dependence on the saturation magnetization \({M}_{{{{\rm{s}}}}}^{{{{\rm{t}}}}}\) (with j1 = 60 MA cm−2). The insets show the calculated values of \(\left\vert \langle {V}_{j}\rangle \right\vert /\Delta\) with d12 = 40 nm and 34 nm for a and b, respectively. Other parameters are the same as those in Fig. 1.
