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Spin transfer switching enhancement in perpendicular anisotropy magnetic tunnel junctions with a canted in-plane spin polarizer
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10.1063/1.3055373
/content/aip/journal/jap/105/1/10.1063/1.3055373
http://aip.metastore.ingenta.com/content/aip/journal/jap/105/1/10.1063/1.3055373
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Schematic of a perpendicular anisotropy MTJ with the free layer sandwiched between two spin polarizer layers with different easy axis directions and different barrier/spacer layers. The conventions used for directions and applied currents are also shown.

Image of FIG. 2.
FIG. 2.

ST magnetization reversal curves under a pulsed current of 2 ns. The magnitude of the ST field is varied from 100 to 300 Oe. Inset: hysteresis loop of the free layer with of , of 5 nm, and of 6.7 kOe.

Image of FIG. 3.
FIG. 3.

Magnetic moment distribution of the free layer at different times during the reversal process upon the application of a ST effective field of 200 Oe.

Image of FIG. 4.
FIG. 4.

Calculated inverse switching time vs for different free layer anisotropies. The solid lines are linear fits to the data.

Image of FIG. 5.
FIG. 5.

Time dependence of free layer magnetization for different for a of 300 Oe. Inset: percent reduction in switching time due to the insertion of polarizer 2.

Image of FIG. 6.
FIG. 6.

Switching time as a function of the canting angle of polarizer 2 for a fixed of 300 Oe.

Image of FIG. 7.
FIG. 7.

(a) Case A: switching process for the transition where majority electrons from the free layer entering polarizer 2 tilt it downward and enhances the ST assist effect. (b) Case B: switching process for the transition where minority electrons scattered from the free layer back into polarizer 2 also tilt it downwards and enhance the ST assist effect.

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/content/aip/journal/jap/105/1/10.1063/1.3055373
2009-01-06
2014-04-16
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Spin transfer switching enhancement in perpendicular anisotropy magnetic tunnel junctions with a canted in-plane spin polarizer
http://aip.metastore.ingenta.com/content/aip/journal/jap/105/1/10.1063/1.3055373
10.1063/1.3055373
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