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Domain wall chirality reversal by interfacial engineering in Pt/Co/Pt based perpendicularly magnetized systems

Maji, S and Mukhopadhyay, A and Kayal, S and Anil Kumar, PS (2023) Domain wall chirality reversal by interfacial engineering in Pt/Co/Pt based perpendicularly magnetized systems. In: Journal of Applied Physics, 133 (2).

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Official URL: https://doi.org/10.1063/5.0117198


Heavy metal/ferromagnet interfaces in systems with perpendicular magnetic anisotropy (PMA) hosts chiral Néel wall with the assistance of interfacial Dzyaloshinskii-Moriya interaction (iDMI). We have investigated field induced domain wall motion in the creep regime to estimate the effective iDMI strength, D eff of sputter-deposited Ta/Pt/Co/Pt and Ta/Pt/Co/Au/Pt thin films that exhibit PMA. Two similar Pt/Co interfaces on either side of the Co layer in the Ta/Pt/Co/Pt system lead to a small D eff with a negative sign that supports the Néel type domain wall of right-handed chirality. Ultrathin Au layers of different thicknesses have been deposited at the top Co/Pt interface to introduce asymmetry around the Co layer and control the D eff . Here, two interfaces (Pt/Co and Au/Co) of opposite iDMI polarity have been chosen to invert the domain wall chirality to the left-handed chirality instead of the right-handed chirality found in the Ta/Pt/Co/Pt system. © 2023 Author(s).

Item Type: Journal Article
Publication: Journal of Applied Physics
Publisher: American Institute of Physics Inc.
Additional Information: The copyright for this article belongs to the Authors.
Keywords: Domain walls; Gold deposits; Heavy metals; Magnetic anisotropy, Creep regime; Domain wall motion; Dzyaloshinskii-Moriya interaction; Ferromagnets; Field-induced; Interaction strength; Neel walls; Perpendicular magnetic anisotropy; Pt-systems; Right handed, Chirality
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Date Deposited: 10 Feb 2023 04:25
Last Modified: 10 Feb 2023 04:25
URI: https://eprints.iisc.ac.in/id/eprint/80140

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