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Stable and manipulable Bloch point

Stable and manipulable Bloch point
Stable and manipulable Bloch point
The prediction of magnetic skyrmions being used to change the way we store and process data has led to materials with Dzyaloshinskii-Moriya interaction coming into the focus of intensive research. So far, studies have looked mostly at magnetic systems composed of materials with single chirality In a search for potential future spintronic devices, combination of materials with different chirality into a single system may represent an important new avenue for research. Using finite element micromagnetic simulations, we study an FeGe disk with two layers of different chirality. We show that for particular thicknesses of layers, a stable Bloch point emerges at the interface between two layers. In addition, we demonstrate that the system undergoes hysteretic behaviour and that two different types of Bloch point exist. These 'head-to-head' and 'tail-to-tail' Bloch point configurations can, with the application of an external magnetic field, be switched between. Finally, by investigating the time evolution of the magnetisation field, we reveal the creation mechanism of the Bloch point. Our results introduce a stable and manipulable Bloch point to the collection of particle-like state candidates for the development of future spintronic devices.
2045-2322
1-8
Beg, Marijan
499a2633-2ab7-4ec3-ab2a-c6eae1874f83
Pepper, Ryan A.
82ef34fc-7e93-4f98-8f85-ff0e5113ed17
Cortés-Ortuño, David
97d026d6-1083-4edf-8ba6-2f66a3e15033
Atie, Bilal
f7c8cb8d-c5ec-4dbf-be85-6177308e769b
Bisotti, Marc-Antonio
be2d7abd-afdc-4d18-a2e9-a633d73a67b9
Downing, Gary Matthew
afba83d7-51c7-4b68-92cc-43e43c8c0ea2
Kluyver, Thomas
d3bd4245-1a99-4268-b34f-8f9f0153465e
Hovorka, Ondrej
a12bd550-ad45-4963-aa26-dd81dd1609ee
Fangohr, Hans
9b7cfab9-d5dc-45dc-947c-2eba5c81a160
Beg, Marijan
499a2633-2ab7-4ec3-ab2a-c6eae1874f83
Pepper, Ryan A.
82ef34fc-7e93-4f98-8f85-ff0e5113ed17
Cortés-Ortuño, David
97d026d6-1083-4edf-8ba6-2f66a3e15033
Atie, Bilal
f7c8cb8d-c5ec-4dbf-be85-6177308e769b
Bisotti, Marc-Antonio
be2d7abd-afdc-4d18-a2e9-a633d73a67b9
Downing, Gary Matthew
afba83d7-51c7-4b68-92cc-43e43c8c0ea2
Kluyver, Thomas
d3bd4245-1a99-4268-b34f-8f9f0153465e
Hovorka, Ondrej
a12bd550-ad45-4963-aa26-dd81dd1609ee
Fangohr, Hans
9b7cfab9-d5dc-45dc-947c-2eba5c81a160

Beg, Marijan, Pepper, Ryan A., Cortés-Ortuño, David, Atie, Bilal, Bisotti, Marc-Antonio, Downing, Gary Matthew, Kluyver, Thomas, Hovorka, Ondrej and Fangohr, Hans (2019) Stable and manipulable Bloch point. Scientific Reports, 9, 1-8. (doi:10.1038/s41598-019-44462-2).

Record type: Article

Abstract

The prediction of magnetic skyrmions being used to change the way we store and process data has led to materials with Dzyaloshinskii-Moriya interaction coming into the focus of intensive research. So far, studies have looked mostly at magnetic systems composed of materials with single chirality In a search for potential future spintronic devices, combination of materials with different chirality into a single system may represent an important new avenue for research. Using finite element micromagnetic simulations, we study an FeGe disk with two layers of different chirality. We show that for particular thicknesses of layers, a stable Bloch point emerges at the interface between two layers. In addition, we demonstrate that the system undergoes hysteretic behaviour and that two different types of Bloch point exist. These 'head-to-head' and 'tail-to-tail' Bloch point configurations can, with the application of an external magnetic field, be switched between. Finally, by investigating the time evolution of the magnetisation field, we reveal the creation mechanism of the Bloch point. Our results introduce a stable and manipulable Bloch point to the collection of particle-like state candidates for the development of future spintronic devices.

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Accepted/In Press date: 17 May 2019
e-pub ahead of print date: 28 May 2019

Identifiers

Local EPrints ID: 430978
URI: https://eprints.soton.ac.uk/id/eprint/430978
ISSN: 2045-2322
PURE UUID: d0d5d8ed-5a12-4ade-ace2-667844fa3c71
ORCID for David Cortés-Ortuño: ORCID iD orcid.org/0000-0003-3799-3141
ORCID for Thomas Kluyver: ORCID iD orcid.org/0000-0003-4020-6364

Catalogue record

Date deposited: 21 May 2019 16:30
Last modified: 11 Sep 2019 00:24

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Contributors

Author: Marijan Beg
Author: Ryan A. Pepper
Author: David Cortés-Ortuño ORCID iD
Author: Bilal Atie
Author: Marc-Antonio Bisotti
Author: Gary Matthew Downing
Author: Thomas Kluyver ORCID iD
Author: Ondrej Hovorka
Author: Hans Fangohr

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