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Multiple 360° domain wall switching in thin ferromagnetic nanorings in a circular magnetic field
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10.1063/1.3673812
/content/aip/journal/jap/111/7/10.1063/1.3673812
http://aip.metastore.ingenta.com/content/aip/journal/jap/111/7/10.1063/1.3673812
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

(Color online) (a) Vorticity vs current hysteresis of an 800 nm diameter, 300 nm wide, 5 nm thick Permalloy ring. (b) The magnetization immediately after switching, revealing two 360° DWs at −60 mA. (c) The magnetization at −180 mA, showing the DW with the same circulation as the vortex (winding number, +1) annihilated.

Image of FIG. 2.
FIG. 2.

(Color) (a) Two 360° DW state in an 800 nm diameter, 150 nm wide, 5 nm thick Permalloy ring. The red/blue coloring indicates the extent to which the moments point to the right (red) or left (blue). (b) The resulting one DW state after the center of the current is positioned at (1), annihilating the DW with the same circulation as the vortex. (c) The resulting one DW state after the center of the current is positioned at (2), annihilating the DW with the opposite circulation as the vortex.

Image of FIG. 3.
FIG. 3.

(Color online) A plot of the exchange energy (bottom), demagnetization energy (middle), and demagnetization + exchange energy (top) for an 800 nm diameter, 150 nm wide, 5 nm thick Permalloy ring. The tip is placed off center to control which DW is annihilated and a current of 8 mA generates the magnetic field that leads to the annihilation of one of the DWs. The total energy barrier is smaller to annihilate the DW with the same circulation as the ring vortex.

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/content/aip/journal/jap/111/7/10.1063/1.3673812
2012-02-28
2014-04-20
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Multiple 360° domain wall switching in thin ferromagnetic nanorings in a circular magnetic field
http://aip.metastore.ingenta.com/content/aip/journal/jap/111/7/10.1063/1.3673812
10.1063/1.3673812
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