Observation of ice-rule violation and monopole dynamics via edge nucleation of domain walls in artificial spin ice lattice

Observation of ice-rule violation and monopole dynamics via edge nucleation of domain walls in artificial spin ice lattice

In a patterned Co honeycomb spin ice structure, we show that violation in the ice-rule or magnetic monopoles, can be observed during a magnetization reversal process in 430 Oe≤H≤760 Oe magnetic field (H) range. The monopoles are shown to originate from the nucleation of domain walls at the edges, an...

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Main Authors: Krishnia, Sachin, Purnama, Indra, Lew, Wen Siang
Other Authors: School of Physical and Mathematical Sciences
Format: Article
Language:English
Published: 2017
Subjects:
Domain Walls
Spin Ice
Online Access:https://hdl.handle.net/10356/85725
http://hdl.handle.net/10220/43811
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-857252020-03-07T12:37:04Z Observation of ice-rule violation and monopole dynamics via edge nucleation of domain walls in artificial spin ice lattice Krishnia, Sachin Purnama, Indra Lew, Wen Siang School of Physical and Mathematical Sciences Domain Walls Spin Ice In a patterned Co honeycomb spin ice structure, we show that violation in the ice-rule or magnetic monopoles, can be observed during a magnetization reversal process in 430 Oe≤H≤760 Oe magnetic field (H) range. The monopoles are shown to originate from the nucleation of domain walls at the edges, and they hop towards the other edge via the propagation of magnetic domain walls. The paths that the domain walls traveled or the Dirac strings, are shown to increase in length with magnetic fields increment and no random flipping of the bars are observed in the structure. NRF (Natl Research Foundation, S’pore) MOE (Min. of Education, S’pore) 2017-09-28T06:27:37Z 2019-12-06T16:09:07Z 2017-09-28T06:27:37Z 2019-12-06T16:09:07Z 2016 Journal Article Krishnia, S., Purnama, I., & Lew, W. S. (2016). Observation of ice-rule violation and monopole dynamics via edge nucleation of domain walls in artificial spin ice lattice. Journal of Magnetism and Magnetic Materials, 420,158-165. 0304-8853 https://hdl.handle.net/10356/85725 http://hdl.handle.net/10220/43811 10.1016/j.jmmm.2016.07.005 en Journal of Magnetism and Magnetic Materials © 2016 Elsevier B.V.
institution Nanyang Technological University
building NTU Library
country Singapore
collection DR-NTU
language English
topic Domain Walls
Spin Ice
spellingShingle Domain Walls
Spin Ice
Krishnia, Sachin
Purnama, Indra
Lew, Wen Siang
Observation of ice-rule violation and monopole dynamics via edge nucleation of domain walls in artificial spin ice lattice
description In a patterned Co honeycomb spin ice structure, we show that violation in the ice-rule or magnetic monopoles, can be observed during a magnetization reversal process in 430 Oe≤H≤760 Oe magnetic field (H) range. The monopoles are shown to originate from the nucleation of domain walls at the edges, and they hop towards the other edge via the propagation of magnetic domain walls. The paths that the domain walls traveled or the Dirac strings, are shown to increase in length with magnetic fields increment and no random flipping of the bars are observed in the structure.
author2 School of Physical and Mathematical Sciences
author_facet School of Physical and Mathematical Sciences
Krishnia, Sachin
Purnama, Indra
Lew, Wen Siang
format Article
author Krishnia, Sachin
Purnama, Indra
Lew, Wen Siang
author_sort Krishnia, Sachin
title Observation of ice-rule violation and monopole dynamics via edge nucleation of domain walls in artificial spin ice lattice
title_short Observation of ice-rule violation and monopole dynamics via edge nucleation of domain walls in artificial spin ice lattice
title_full Observation of ice-rule violation and monopole dynamics via edge nucleation of domain walls in artificial spin ice lattice
title_fullStr Observation of ice-rule violation and monopole dynamics via edge nucleation of domain walls in artificial spin ice lattice
title_full_unstemmed Observation of ice-rule violation and monopole dynamics via edge nucleation of domain walls in artificial spin ice lattice
title_sort observation of ice-rule violation and monopole dynamics via edge nucleation of domain walls in artificial spin ice lattice
publishDate 2017
url https://hdl.handle.net/10356/85725
http://hdl.handle.net/10220/43811
_version_ 1681045179544371200

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