Tuning the interfacial Dzyaloshinskii-Moriya interaction in perpendicularly magnetized CoFeB system

Ravi Kumar, B and Guddeti, S and Anil Kumar, PS (2022) Tuning the interfacial Dzyaloshinskii-Moriya interaction in perpendicularly magnetized CoFeB system. In: Journal of Physics D: Applied Physics, 55 (44).

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Abstract

Magnetic field driven domain-wall motion in the creep regime is investigated with Kerr microscopy in out-of-plane magnetized as-deposited and annealed Ta/Pt/CoFeB/Pt multilayers. In addition to the effect of thermal annealing on the quasi-static magnetic properties of Ta (3 nm)/Pt (3 nm)/CoFeB ( t C o F e B nm)/Pt (2 nm) film stacks where t C o F e B = 0.72 , 0.93 , the study focuses on the modified interfacial Dzyaloshinskii-Moriya interaction (iDMI) that governs the dynamics of chiral domain walls. The strength of the iDMI decreases with an increase in both t C o F e B at a fixed annealing temperature and annealing temperature for a fixed t C o F e B . While the former behaviour arises due to the interfacial nature of iDMI, the latter correlates with the annealing induced suppression of magnetization and enhancement of interface roughness that could be, respectively, ascribed to B-segregation and Co-Fe-Pt intermixing. © 2022 IOP Publishing Ltd.

Item Type:	Journal Article
Publication:	Journal of Physics D: Applied Physics
Publisher:	Institute of Physics
Additional Information:	The copyright for this article belongs to Institute of Physics.
Keywords:	Annealing; Cobalt alloys; Cobalt compounds; Domain walls; Iron alloys; Iron compounds; Magnetic domains; Platinum compounds; Ternary alloys, Annealing temperatures; Creep regime; Domain wall motion; Dzyaloshinskii-Moriya interaction; Kerr microscopy; Magnetic-field; Out-of-plane; Perpendicular magnetic anisotropy; Quasi-static; Thermal-annealing, Magnetic anisotropy
Department/Centre:	Division of Interdisciplinary Sciences > Centre for Nano Science and Engineering Division of Physical & Mathematical Sciences > Physics
Date Deposited:	29 Jan 2023 06:25
Last Modified:	29 Jan 2023 06:25
URI:	https://eprints.iisc.ac.in/id/eprint/79567

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