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Micromagnetic study of switching boundary of a spin torque nanodevice
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View: Figures


Image of FIG. 1.
FIG. 1.

Phase boundaries in calculated using an exchange constant of . Blue (dark gray): parallel state (P); yellow (light gray): antiparallel state (AP); and gray: oscillatory dynamic states (O). Inset: the temporal evolution of the average magnetization along the easy-axis (x) for different phase states P, O, and AP. The two dotted lines represent the instability and switching boundaries in the figure, the details of which is explained in the main text.

Image of FIG. 2.
FIG. 2.

Phase boundaries in . Blue (gray): parallel state (P); yellow (light gray): antiparallel state (AP); and gray (black): chaotic dynamics state (c). Inset: the magnetization trajectories for different currents when (1) , (2) , (3) , and (4) . The solid red circle (2) and solid gray circle (3) in region C represent a typical incoherent spin wave excitation and a complete reversal of the free layer magnetization, respectively. The instability line separates P and C states and the deterministic switching line gives the boundary of C and AP states.

Image of FIG. 3.
FIG. 3.

The dotted line represents the extended switching line given by single domain model in Fig. 1. The dashed dotted line is the extended deterministic switching line given by micromagnetics simulations in Fig. 2. The solid line represents the extended experimental switching line (Ref. 33). The red (black) circle highlights the comparison of the interception values of the boundary line with axis between micromagnetic simulation and experiment (Ref. 33).


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Micromagnetic study of switching boundary of a spin torque nanodevice