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Ultrafast magnetization dynamics in magnetic tunneling junctions
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10.1063/1.3605557
/content/aip/journal/apl/98/26/10.1063/1.3605557
http://aip.metastore.ingenta.com/content/aip/journal/apl/98/26/10.1063/1.3605557
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

(Color online) Simulated magnetic moment (m y , normalized) versus the elapsed time (in nanosecond), after applying Hy =1 Oe (step) to MTJ sensors with different heights: (a) 0.75 μm, (b) 3.0 μm, and (c) 6.0 μm, but a fixed width of 6.0 μm. (d) Response time τ as a function of the MTJ aspect ratio. In all simulations, the damping coefficient α is held at 0.02.

Image of FIG. 2.
FIG. 2.

(Color online) Simulated magnetization (m x and m y ) distribution, before and after the application of Hy = 1 Oe (step), for three types of MTJ sensors with different heights: (a) 0.75 μm, (b) 3.0 μm, and (c) 6.0 μm, but a fixed width of 6.0 μm. The color bar indicates the magnitude of m x and m y . The damping coefficient α is held at 0.02 in all simulations.

Image of FIG. 3.
FIG. 3.

(Color online) (a) Response time τ in a color-coded map as a function of both free-layer thickness t free and damping coefficient α. (b) Response time τ as a function of both free-layer saturation magnetization M s and damping factor α.

Image of FIG. 4.
FIG. 4.

(Color online) MTJ size dependence of the intrinsic ferromagnetic resonance frequency f 0. These junctions have the same aspect ratio of 8:1 but different width ranging from 0.6 μm to 6.0 μm. Both the free-layer thickness t free and damping coefficient α are held constantly at 15 Å and 0.02 in the micromagnetic simulations.

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/content/aip/journal/apl/98/26/10.1063/1.3605557
2011-06-30
2014-04-20
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Ultrafast magnetization dynamics in magnetic tunneling junctions
http://aip.metastore.ingenta.com/content/aip/journal/apl/98/26/10.1063/1.3605557
10.1063/1.3605557
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