Fig. 3: Electric resistance probes for magnetic fluctuations and the inverted states.
From: Dynamical stability by spin transfer in nearly isotropic magnets
a,b, Observed angular MR in the coordinate system of Fig. 2a for negative (a) and positive (b) currents, normalized by the resistance at ϕ = 0∘ for each current. c, \(1-\langle {M}_{y}^{2}\rangle /{M}_{\,{\rm{s}}}^{2}\) calculated by the stochastic LLG equation in the macrospin approximation. d–f, Time-dependent trajectories of the macrospin moment calculated by the stochastic LLG equation for currents 0.1 mA (d), 4.1 mA (e) and 7 mA (f) and ϕ = 270∘. The field strength is 125 mT for a–f. g, Resistance versus d.c. current measurements for applied magnetic fields 25–200 mT along ϕ = 270∘. h, Calculated \(1-\langle {M}_{y}^{2}\rangle /{M}_{{\rm{s}}}^{2}\) as a function of current and applied magnetic field. i, Ic extracted in g for different field strengths and angles (dots) and linear fits (lines). The inset shows the slope (dots) and a fit by \(\sin \phi\) (curve).
