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Transverse domain wall scattering and pinning by magnetic impurities in magnetic nanowires
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10.1063/1.4812562
/content/aip/journal/jap/114/1/10.1063/1.4812562
http://aip.metastore.ingenta.com/content/aip/journal/jap/114/1/10.1063/1.4812562
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Schematic view of the nanowire with length along x-axis, width ω along y-axis, and thickness along z-axis. Initially, the TDW is considered in the center of the nanowire at  = 0.

Image of FIG. 2.
FIG. 2.

Snapshots of the dynamical behavior of the TDW near an attractive magnetic impurity in the nanowire with . The black circle symbol represents a magnetic impurity. (a) A typical initial configuration with the TDW at the center of the nanowire and the magnetic impurity located eight sites away from the center. (b) Configuration after 7 ns. (c) Configuration after 14 ns showing TDW pinning at the magnetic impurity.

Image of FIG. 3.
FIG. 3.

Snapshots of the dynamical behavior of the TDW near an repulsive magnetic impurity in the nanowire with . The black circle symbol represents a magnetic impurity. (a) A typical initial configuration with the TDW at the center of the nanowire and the magnetic impurity located eight sites away from the center. (b) Configuration after 7 ns. (c) Configuration after 14 ns showing TDW scattering by the magnetic impurity.

Image of FIG. 4.
FIG. 4.

Schematic view of how we consider the y position of the magnetic impurity in the nanowire. In this example, the nanowire has . Bottom edge refers to the edge where the TDW magnetization points toward the inside of the nanowire, and top edge refers to the edge where the TDW magnetization points toward the outside of the nanowire.

Image of FIG. 5.
FIG. 5.

Interaction energy as a function of the relative distance (), between TDW and magnetic impurity considering the TDW located at the center of the nanowire ( = 0). The interaction energy was calculated for several values of the position to the magnetic impurity along the y-axis (y/a). Here, we consider and nm.

Image of FIG. 6.
FIG. 6.

Interaction energy as a function of the relative distance (), between TDW and magnetic impurity considering the TDW located at the center of the nanowire ( = 0). The interaction energy was calculated for several values of the position to the magnetic impurity along the y-axis (y/a). Here, we consider and nm.

Image of FIG. 7.
FIG. 7.

Interaction energy as a function of the relative distance (), between TDW and magnetic impurity considering the TDW located at the center of the nanowire ( = 0). The interaction energy was calculated for several values of the position to the magnetic impurity along the y-axis (y/a). Here, we consider and nm.

Image of FIG. 8.
FIG. 8.

Interaction energy as a function of the relative distance (), between TDW and magnetic impurity considering the TDW located at the center of the nanowire ( = 0). The interaction energy was calculated for several values of the . Here, we consider nm and the impurity located on the bottom edge of the nanowire at  = −2.5.

Image of FIG. 9.
FIG. 9.

TDW velocity as a function of time in a nanowire with nm and a magnetic impurity ( ) at  = 70,  = −1.5. The applied magnetic field pulse has the amplitude 2 mT and 1.0 ns.

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/content/aip/journal/jap/114/1/10.1063/1.4812562
2013-07-01
2014-04-20
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Transverse domain wall scattering and pinning by magnetic impurities in magnetic nanowires
http://aip.metastore.ingenta.com/content/aip/journal/jap/114/1/10.1063/1.4812562
10.1063/1.4812562
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