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(Color online) Part of the time-evolution of P sw in MTJ cells. (a)Bold (blue in color) and thin (red in color) lines represent the majority (I set = 0.85 mA) and minority (I set = 0.96 mA) samples, respectively. (b)–(c) The majority (minority) sample shows a single (multiple) peak(s) at P sw of about 0.47 (P sw of about 0.46, 0.52, and 0.63). Black lines represent Gaussian fits. The difference of the main peak positions between the cases of (b) and (c) is due to the different I set.
(Color online) (a)–(c) Histograms of P sw at I set of 0.90, 0.95, and 1.00 mA. Vertical axes are in the logarithmic scale. The main peak and subpeak at higher probability are labeled A and B, respectively. (d) Peak positions of the two prominent peaks, A and B, as a function of I set. Lines represent fit based on the thermally activated spin-torque switching model.
(Color online) Histogram of lifetime (t life) of P sw of below 0.55 (A) and P sw of above 0.55 (B). Lines are least-square fits to the Poisson process. The inset shows the definition of t life A and t life B.
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