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Nanoscale switch for vortex polarization mediated by Bloch core formation in magnetic hybrid systems

Wohlhuter, Phillip ; Bryan, Matthew Thomas ; Saharan, Lalita ; Suszka, Anna Kinga ; Moutafis, Christoforos ; Chopdekar, Rajesh Vilas ; Raabe, Jörg; Thomson, Thomas; Hrkac, Gino; Heyderman, Laura Jane; Warnicke, Peter; Gliga, Sebastian ; Stevenson, Stephanie Elizabeth; Heldt, Georg

Nature Communications. 2015;6.

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Abstract

Vortices are fundamental magnetic topological structures characterized by a curling magnetization around a highly stable nanometric core. The control of the polarization of this core and its gyration is key to the utilization of vortices in technological applications. So far polarization control has been achieved in single-material structures using magnetic fields, spin-polarized currents or spin waves. Here we demonstrate local control of the vortex core orientation in hybrid structures where the vortex in an in-plane Permalloy film coexists with out-of-plane maze domains in a Co/Pd multilayer. The vortex core reverses its polarization on crossing a maze domain boundary. This reversal is mediated by a pair of magnetic singularities, known as Bloch points, and leads to the transient formation of a three-dimensional magnetization structure: a Bloch core. The interaction between vortex and domain wall thus acts as a nanoscale switch for the vortex core polarization.

Bibliographic metadata

Type of resource:
Content type:
Publication status:
Published
Publication type:
Publication form:
Published date:
Accepted date:
2015-06-10
Journal title:
Abbreviated journal title:
ISSN:
Volume:
6
Article number:
7836
Digital Object Identifier:
10.1038/ncomms8836
Attached files embargo period:
Immediate release
Attached files release date:
5th August, 2015
Access state:
Active

Institutional metadata

University researcher(s):

Record metadata

Manchester eScholar ID:
uk-ac-man-scw:269484
Created by:
Bentley, Hazel
Created:
28th July, 2015, 09:55:56
Last modified by:
Bentley, Hazel
Last modified:
12th December, 2015, 08:16:19

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