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Spin-torque effect on spin wave modes in magnetic nanowires
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10.1063/1.4747152
/content/aip/journal/apl/101/7/10.1063/1.4747152
http://aip.metastore.ingenta.com/content/aip/journal/apl/101/7/10.1063/1.4747152
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

(a) Schema of the nanowire connected to two electrodes as used in the simulations. (b) Snapshot of the normalized average magnetization along x-axis in the equilibrium configuration. The cylinder has a diameter-to-length ratio of 0.1 with L = 300 nm.

Image of FIG. 2.
FIG. 2.

Spin wave eigenmodes in a nano-cylinder excited by magnetic fields: (a) edge mode, (b) fundamental mode, (c) and (d) mixed modes. The power FFT distributions of dynamical magnetization are shown in a false color code that is normalized to 1. The external field is applied along the long axis.

Image of FIG. 3.
FIG. 3.

Interaction of the spin wave modes in a nano-cylinder with a dc current. The same spin wave-modes as in Fig. 2 are shown. The power FFT distributions of dynamical magnetization are shown in a false color code that is normalized to 1.

Image of FIG. 4.
FIG. 4.

Interaction of the edge mode (left) and uniform mode (right) with a dc current of amplitude: in (a) and (d), in (b) and (e), in (c) and (f). Above the critical current, the edge mode propagates in the cylinder while the uniform mode is suppressed. The current was applied for 5 ns and no domain walls are present. The power FFT distributions of dynamical magnetization are shown in a false color code that is normalized to 1.

Image of FIG. 5.
FIG. 5.

(a) Isosurfaces of the variable magnetization at one edge of the nanowire. The local gradient of m is normal to the isosurfaces. (b) Variation of the edge mode frequency with applied magnetic field in absence of current.

Image of FIG. 6.
FIG. 6.

Effect of the spin torque on the spin wave modes (2,1) and (6,1) after a dc current of is applied for 5 ns. The profile of the propagating edge mode is shown in Fig. 4(b). The power FFT distributions of dynamical magnetization are shown in a false color code that is normalized to 1.

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/content/aip/journal/apl/101/7/10.1063/1.4747152
2012-08-17
2014-04-20
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Spin-torque effect on spin wave modes in magnetic nanowires
http://aip.metastore.ingenta.com/content/aip/journal/apl/101/7/10.1063/1.4747152
10.1063/1.4747152
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