Lal, Manohar and Sakshath, S and Parakkat, Vineeth Mohanan and Kumar, P S Anil (2018) Control of vortex state in cobalt nanorings with domain wall pinning centers. In: 62nd Annual Conference on Magnetism and Magnetic Materials (MMM), NOV 06-10, 2017, Pittsburgh, PA.
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Abstract
Magnetic rings at the mesoscopic scale exhibit new spin configuration states and switching behavior, which can be controlled via geometrical structure, material composition and applied field. Vortex states in magnetic nanorings ensure flux closure, which is necessary for low stray fields in high packing density in memory devices. We performed magnetoresistance measurements on cobalt nanoring devices and show that by attaching nanowires to the ring, the vortex state can be stabilized. When a square pad is attached to the free end of the wire, the domain wall nucleation field in the nanowire is reduced. In addition, the vortex state persists over a larger range of magnetic fields, and exists at all in-plane orientations of the magnetic field. These experimental findings are well supported by our micromagnetic simulations. (C) 2017 Author(s).
| Item Type: | Conference Proceedings |
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| Additional Information: | Copy right of this article belong to 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: | 27 Jun 2018 17:46 |
| Last Modified: | 27 Jun 2018 17:46 |
| URI: | http://eprints.iisc.ac.in/id/eprint/60096 |
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