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...
| Main Authors: | , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
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2017
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| Online Access: | https://hdl.handle.net/10356/85725 http://hdl.handle.net/10220/43811 |
| _version_ | 1811693820996222976 |
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| author | Krishnia, Sachin Purnama, Indra Lew, Wen Siang |
| author2 | School of Physical and Mathematical Sciences |
| author_facet | School of Physical and Mathematical Sciences Krishnia, Sachin Purnama, Indra Lew, Wen Siang |
| author_sort | Krishnia, Sachin |
| collection | NTU |
| 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. |
| first_indexed | 2024-10-01T06:57:46Z |
| format | Journal Article |
| id | ntu-10356/85725 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T06:57:46Z |
| publishDate | 2017 |
| record_format | dspace |
| spelling | ntu-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. |
| 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 |
| title | 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_short | 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 |
| topic | Domain Walls Spin Ice |
| url | https://hdl.handle.net/10356/85725 http://hdl.handle.net/10220/43811 |
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