Geometry-induced Bloch point domain wall in Permalloy conical frustum nanowires for advanced spintronics applications
Date
2024-04-29Author
Broens, Martín I.
Saavedra, Eduardo
Bajales, Noelia
Laroze, David
Escrig, Juan
ORCID
https://orcid.org/0000-0003-2224-5204https://orcid.org/0000-0002-2842-2526
https://orcid.org/0000-0002-2507-9224
https://orcid.org/0000-0002-2507-9224
https://orcid.org/0000-0002-2507-9224
Metadata
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In this study, we investigate the pseudo-static magnetic properties of Permalloy conical frustum nanowires using micromagnetic simulations. We thoroughly examine how both the major and minor radii influence the magnetic reversal mechanism when an external magnetic field is applied parallel to the nanowire axis. The obtained results show that under specific geometrical conditions, magnetization reverts though a Bloch point-type domain wall. In these cases, hysteresis curves exhibit two Barkhausen jumps during magnetization reversal, forming a plateau field range in which a Bloch point domain wall nucleates and propagates until its annihilation after the second Barkhausen jump. The nucleation of a Bloch point domain wall in a frustum conical nanowire geometry is reported. These findings highlight the significance of this geometry in nucleating these attractive topological defects for promising applications.
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Broens, M. I., Saavedra, E., Bajales, N., Laroze, D., & Escrig, J. (2024). Geometry-induced Bloch point domain wall in Permalloy conical frustum nanowires for advanced spintronics applications. Applied Physics Letters, 124(18).
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