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The typical STT-MRAM structure. F1,2,3 are ferromagnetic layers, and NM, I, and AFM are the non-magnetic, insulator, and antiferromagnetic layers, respectively. The positive current density is defined from the bottom to the top, and x-axis is the long axis of the ellipse. The average magnetization angle, , for F3 are also depicted.
The stable magnetization configurations of (a) and (d) for F1, (b) and (e) for F2, and (c) and (f) for F3 layers with = 5 and 20°, respectively.
Jc as a function of for m3/A (blue circles, green triangles, and red rectangles). The blue solid horizontal line indicates J = 2.25 × 1011 A/m2.
Time dependency of the average magnetization of F1, mx (a) from 0 to 12 ns, (b) from 0 to 3.5 ns for = 0, 5, 10, 15, 20 and 30° with J = 2.25 × 1011 A/m2. The insets are snapshots of the spin configuration of the switching layer for = 0 and 30° at t = 6.08 and 4.21 ns, respectively.
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