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Copper dusting effects on perpendicular magnetic anisotropy in Pt/Co/Pt tri-layers

Parakkat, Vineeth Mohanan and Ganesh, KR and Kumar, Anil PS (2016) Copper dusting effects on perpendicular magnetic anisotropy in Pt/Co/Pt tri-layers. In: 13th Joint Magnetism and Magnetic Materials (MMM)/Intermag Conference, JAN 11-15, 2016, San Diego, CA.

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Official URL: http://dx.doi.org/10.1063/1.4944514

Abstract

The effect of Cu dusting on perpendicular magnetic anisotropy of sputter grown Pt/Co/Pt stack in which the Cu layer is in proximity with that of Co is investigated in this work. We used magneto optic Kerr effect microscopy measurements to study the variation in the reversal mechanisms in films with Co thicknesses below 0.8nm by systematically varying their perpendicular magnetic anisotropy using controlled Cu dusting. Cu dusting was done separately above and below the cobalt layer in order to understand the role of bottom and top Pt layers in magnetization reversal mechanisms of sputtered Pt/Co/Pt stack. The introduction of even 0.3nm thick Cu layer below the cobalt layer drastically affected the perpendicular magnetic anisotropy as evident from the nucleation behavior. On the contrary, even a 4nm thick top Cu layer had little effect on the reversal mechanism. These observations along with magnetization data was used to estimate the role of top and bottom Pt in the origin of perpendicular magnetic anisotropy as well as magnetization switching mechanism in Pt/Co/Pt thin films. Also, with an increase in the bottom Cu dusting from 0.2 to 0.4nm there was an increase in the number of nucleation sites resulting in the transformation of domain wall patterns from a smooth interface type to a finger like one and finally to maze type. (C) 2016 Author(s).

Item Type: Conference Proceedings
Additional Information: Copy right of this article belongs to the AMER INST PHYSICS, 1305 WALT WHITMAN RD, STE 300, MELVILLE, NY 11747-4501 USA
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Depositing User: Id for Latest eprints
Date Deposited: 19 Jul 2016 10:07
Last Modified: 19 Jul 2016 10:07
URI: http://eprints.iisc.ac.in/id/eprint/54205

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