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Control of vortex state in cobalt nanorings with domain wall pinning centers

Authors :
Manohar Lal
S. Sakshath
Vineeth Mohanan Parakkat
P. S. Anil Kumar
Source :
AIP Advances, Vol 8, Iss 5, Pp 056023-056023-5 (2018)
Publication Year :
2018
Publisher :
AIP Publishing LLC, 2018.

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.

Subjects

Subjects :
Physics
QC1-999

Details

Language :
English
ISSN :
21583226
Volume :
8
Issue :
5
Database :
Directory of Open Access Journals
Journal :
AIP Advances
Publication Type :
Academic Journal
Accession number :
edsdoj.04061ac935dd4d6f8c62df2df064512d
Document Type :
article
Full Text :
https://doi.org/10.1063/1.5007239