Highly stable vortex state in sub-100 nm nanomagnets

We report on the magnetization reversal process in sub-100 nm Ni80Fe20 asymmetric ring. The switching mechanism involves a stable vortex state due to the strong anisotropy imposed on the narrow arm of the ring. Experimental demonstration shows that such vortex configuration does not annihilate until...

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Main Authors: Wang, Xinghua, Purnama, Indra, Sekhar, Murapaka Chandra, Lew, Wen Siang
Other Authors: School of Physical and Mathematical Sciences
Format: Article
Language:English
Published: 2013
Online Access:https://hdl.handle.net/10356/99620
http://hdl.handle.net/10220/12614
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-996202020-03-07T12:34:48Z Highly stable vortex state in sub-100 nm nanomagnets Wang, Xinghua Purnama, Indra Sekhar, Murapaka Chandra Lew, Wen Siang School of Physical and Mathematical Sciences We report on the magnetization reversal process in sub-100 nm Ni80Fe20 asymmetric ring. The switching mechanism involves a stable vortex state due to the strong anisotropy imposed on the narrow arm of the ring. Experimental demonstration shows that such vortex configuration does not annihilate until a large reversal field of 1200 Oe. The asymmetry of the structure promotes a unique reversal process, which gives us control over the chirality of the vortex configuration. Micromagnetic simulations reveal that the highly stable vortex configuration is sustainable in the asymmetric ring structures with a diameter as small as 30 nm. 2013-07-31T06:18:26Z 2019-12-06T20:09:34Z 2013-07-31T06:18:26Z 2019-12-06T20:09:34Z 2012 2012 Journal Article Wang, X., Purnama, I., Sekhar, M. C.,& Lew, W. S. (2012). Highly Stable Vortex State in Sub-100 nm Nanomagnets. Applied Physics Express, 5(5). https://hdl.handle.net/10356/99620 http://hdl.handle.net/10220/12614 10.1143/APEX.5.053001 en Applied physics express
institution Nanyang Technological University
building NTU Library
country Singapore
collection DR-NTU
language English
description We report on the magnetization reversal process in sub-100 nm Ni80Fe20 asymmetric ring. The switching mechanism involves a stable vortex state due to the strong anisotropy imposed on the narrow arm of the ring. Experimental demonstration shows that such vortex configuration does not annihilate until a large reversal field of 1200 Oe. The asymmetry of the structure promotes a unique reversal process, which gives us control over the chirality of the vortex configuration. Micromagnetic simulations reveal that the highly stable vortex configuration is sustainable in the asymmetric ring structures with a diameter as small as 30 nm.
author2 School of Physical and Mathematical Sciences
author_facet School of Physical and Mathematical Sciences
Wang, Xinghua
Purnama, Indra
Sekhar, Murapaka Chandra
Lew, Wen Siang
format Article
author Wang, Xinghua
Purnama, Indra
Sekhar, Murapaka Chandra
Lew, Wen Siang
spellingShingle Wang, Xinghua
Purnama, Indra
Sekhar, Murapaka Chandra
Lew, Wen Siang
Highly stable vortex state in sub-100 nm nanomagnets
author_sort Wang, Xinghua
title Highly stable vortex state in sub-100 nm nanomagnets
title_short Highly stable vortex state in sub-100 nm nanomagnets
title_full Highly stable vortex state in sub-100 nm nanomagnets
title_fullStr Highly stable vortex state in sub-100 nm nanomagnets
title_full_unstemmed Highly stable vortex state in sub-100 nm nanomagnets
title_sort highly stable vortex state in sub-100 nm nanomagnets
publishDate 2013
url https://hdl.handle.net/10356/99620
http://hdl.handle.net/10220/12614
_version_ 1681046487093477376