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Transverse Domain Wall Profile for Spin Logic Applications

View Article: PubMed Central - PubMed

ABSTRACT

Domain wall (DW) based logic and memory devices require precise control and manipulation of DW in nanowire conduits. The topological defects of Transverse DWs (TDW) are of paramount importance as regards to the deterministic pinning and movement of DW within complex networks of conduits. In-situ control of the DW topological defects in nanowire conduits may pave the way for novel DW logic applications. In this work, we present a geometrical modulation along a nanowire conduit, which allows for the topological rectification/inversion of TDW in nanowires. This is achieved by exploiting the controlled relaxation of the TDW within an angled rectangle. Direct evidence of the logical operation is obtained via magnetic force microscopy measurement.

No MeSH data available.


(a) Scanning Electron Microscopy image of geometrical modulation, inverter, patterned along the nanowire conduit; Magnetic Force Microscopy images of the topological inverter with initial and final configuration for; (b)-I TTU DW, (b)-II TTD DW and (c)-I HHU DW and (c)-II HHD DW.
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f6: (a) Scanning Electron Microscopy image of geometrical modulation, inverter, patterned along the nanowire conduit; Magnetic Force Microscopy images of the topological inverter with initial and final configuration for; (b)-I TTU DW, (b)-II TTD DW and (c)-I HHU DW and (c)-II HHD DW.

Mentions: The SEM image in Fig. 6(a), shows the angled rectangle structure with ∼+4° orientation with respect to the vertical axis. The initial configuration of the inverter with the selector set in the −y direction and the spins in the conduit aligned along the +x direction is shown in Fig. 6(b)I. Increasing the magnetic field along the −x direction results in the injection of a TTD DW into the conduit. The resulting MFM image after application of a field of 150 Oe along the −x direction is shown in Fig. 6(b)I. This results in the upper branch of the detector switching direction, as seen from the MFM image of final configuration Fig. 6(b)I. This implies that the DW has undergone a topological inversion and the output is a TTU DW.


Transverse Domain Wall Profile for Spin Logic Applications
(a) Scanning Electron Microscopy image of geometrical modulation, inverter, patterned along the nanowire conduit; Magnetic Force Microscopy images of the topological inverter with initial and final configuration for; (b)-I TTU DW, (b)-II TTD DW and (c)-I HHU DW and (c)-II HHD DW.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC5384327&req=5

f6: (a) Scanning Electron Microscopy image of geometrical modulation, inverter, patterned along the nanowire conduit; Magnetic Force Microscopy images of the topological inverter with initial and final configuration for; (b)-I TTU DW, (b)-II TTD DW and (c)-I HHU DW and (c)-II HHD DW.
Mentions: The SEM image in Fig. 6(a), shows the angled rectangle structure with ∼+4° orientation with respect to the vertical axis. The initial configuration of the inverter with the selector set in the −y direction and the spins in the conduit aligned along the +x direction is shown in Fig. 6(b)I. Increasing the magnetic field along the −x direction results in the injection of a TTD DW into the conduit. The resulting MFM image after application of a field of 150 Oe along the −x direction is shown in Fig. 6(b)I. This results in the upper branch of the detector switching direction, as seen from the MFM image of final configuration Fig. 6(b)I. This implies that the DW has undergone a topological inversion and the output is a TTU DW.

View Article: PubMed Central - PubMed

ABSTRACT

Domain wall (DW) based logic and memory devices require precise control and manipulation of DW in nanowire conduits. The topological defects of Transverse DWs (TDW) are of paramount importance as regards to the deterministic pinning and movement of DW within complex networks of conduits. In-situ control of the DW topological defects in nanowire conduits may pave the way for novel DW logic applications. In this work, we present a geometrical modulation along a nanowire conduit, which allows for the topological rectification/inversion of TDW in nanowires. This is achieved by exploiting the controlled relaxation of the TDW within an angled rectangle. Direct evidence of the logical operation is obtained via magnetic force microscopy measurement.

No MeSH data available.