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Dependence of the switching current density on the junction sizes in spin transfer torque
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10.1063/1.4792728
/content/aip/journal/jap/113/7/10.1063/1.4792728
http://aip.metastore.ingenta.com/content/aip/journal/jap/113/7/10.1063/1.4792728
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Typical MTJ structures with synthetic antiferromagnetic fixed layer. The length of the long (short) axis of the ellipse is denoted by “a” (“b”). The labels “A”–“D” indicate the specific position of the junction along the long axis. “A” is the left end and “D” is the center of the ellipse.

Image of FIG. 2.
FIG. 2.

Switching current densities as a function of long axis length a for various short axis length b (=20, 30, and 40 nm) with different exchange stiffness constant A ex of (a) 1.0, (b) 2.0, and (c) 3.0 × 10−11 J/m.

Image of FIG. 3.
FIG. 3.

Switching current densities as a function of long axis length a for various exchange stiffness constant Aex (=1.0, 2.0, and 3.0 × 10−11 J/m) with the length of short axes b of (a) 20, (b) 30, and (c) 40 nm.

Image of FIG. 4.
FIG. 4.

Time dependent normalized Mx for each position A, B, C and D, and total Mx . The exchange stiffness constant is Aex  = 1.0 × 10−11 J/m and the junction dimensions are (a) 60 × 20, (b) 60 × 30, and (c) 60 × 40 nm2 with the current density of 3.0 × 1011 A/m2.

Image of FIG. 5.
FIG. 5.

Fourier transform of the normalized Mx of Fig. 4 for each position A, B, C, and D indicated in Fig. 1 . The exchange stiffness constant is Aex  = 1.0 × 10−11 J/m and the junction dimensions are (a) 60 × 20, (b) 60 × 30, and (c) 60 × 40 nm2 with the current density of 3.0 × 1011 A/m2.

Image of FIG. 6.
FIG. 6.

Snapshots of magnetization configurations at specific times of Fig. 4 . (a, b) are for 60 × 20 nm2, (c, d) are for 60 × 30 nm2, and (e, f) are for 60 × 40 nm2. See more details in supplementary material. 21

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/content/aip/journal/jap/113/7/10.1063/1.4792728
2013-02-19
2014-04-18
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Dependence of the switching current density on the junction sizes in spin transfer torque
http://aip.metastore.ingenta.com/content/aip/journal/jap/113/7/10.1063/1.4792728
10.1063/1.4792728
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