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Article: Micromagnetic simulation of size effects on the properties of ferromagnetic materials

TitleMicromagnetic simulation of size effects on the properties of ferromagnetic materials
Authors
Issue Date2006
PublisherInstitute of Physics Publishing. The Journal's web site is located at http://www.iop.org/Journals/jpd
Citation
Journal Of Physics D: Applied Physics, 2006, v. 39 n. 10, p. 1987-1992 How to Cite?
AbstractMagnetic materials exhibit strikingly different performances at different length scales, especially when their sizes reach nanometer scale, such as ultra-thin films, at which their magnetic properties vary dramatically with the change in material length scale. In order to demonstrate such peculiar behaviour, a numerical simulation was carried out using a carefully devised model, in which the Landau-Lifshitz-Gilbert equation governs the evolution of magnetization. The simulation results clearly showed that there was a critical length at which the coercivity reached a maximum value. In addition, when the length scale was sufficiently small, for example, when it was comparable to or smaller than the exchange length, the phenomenon of coercivity almost vanished and the material was in the so-called superparamagnetic state. The effect of an external stress field on magnetic domain pattern was also taken into account in the present study. The former can affect the latter due to the coupling of the magnetization and elastic fields. © 2006 IOP Publishing Ltd.
Persistent Identifierhttp://hdl.handle.net/10722/75640
ISSN
2015 Impact Factor: 2.772
2015 SCImago Journal Rankings: 0.682
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorHu, RLen_HK
dc.contributor.authorSoh, AKen_HK
dc.contributor.authorNi, Yen_HK
dc.date.accessioned2010-09-06T07:13:08Z-
dc.date.available2010-09-06T07:13:08Z-
dc.date.issued2006en_HK
dc.identifier.citationJournal Of Physics D: Applied Physics, 2006, v. 39 n. 10, p. 1987-1992en_HK
dc.identifier.issn0022-3727en_HK
dc.identifier.urihttp://hdl.handle.net/10722/75640-
dc.description.abstractMagnetic materials exhibit strikingly different performances at different length scales, especially when their sizes reach nanometer scale, such as ultra-thin films, at which their magnetic properties vary dramatically with the change in material length scale. In order to demonstrate such peculiar behaviour, a numerical simulation was carried out using a carefully devised model, in which the Landau-Lifshitz-Gilbert equation governs the evolution of magnetization. The simulation results clearly showed that there was a critical length at which the coercivity reached a maximum value. In addition, when the length scale was sufficiently small, for example, when it was comparable to or smaller than the exchange length, the phenomenon of coercivity almost vanished and the material was in the so-called superparamagnetic state. The effect of an external stress field on magnetic domain pattern was also taken into account in the present study. The former can affect the latter due to the coupling of the magnetization and elastic fields. © 2006 IOP Publishing Ltd.en_HK
dc.languageengen_HK
dc.publisherInstitute of Physics Publishing. The Journal's web site is located at http://www.iop.org/Journals/jpden_HK
dc.relation.ispartofJournal of Physics D: Applied Physicsen_HK
dc.rightsKey Engineering Materials. Copyright © Trans Tech Publications Ltd.en_HK
dc.titleMicromagnetic simulation of size effects on the properties of ferromagnetic materialsen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=1013-9826&volume=334-335&spage=1125&epage=1128&date=2007&atitle=Micromagnetic+simulation+of+size+effects+on+the+properties+of+ferromagnetic+materialsen_HK
dc.identifier.emailSoh, AK:aksoh@hkucc.hku.hken_HK
dc.identifier.authoritySoh, AK=rp00170en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1088/0022-3727/39/10/001en_HK
dc.identifier.scopuseid_2-s2.0-33646728875en_HK
dc.identifier.hkuros156698en_HK
dc.identifier.hkuros128702-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-33646728875&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume39en_HK
dc.identifier.issue10en_HK
dc.identifier.spage1987en_HK
dc.identifier.epage1992en_HK
dc.identifier.isiWOS:000238329100002-
dc.publisher.placeUnited Kingdomen_HK
dc.identifier.scopusauthoridHu, RL=13606954800en_HK
dc.identifier.scopusauthoridSoh, AK=7006795203en_HK
dc.identifier.scopusauthoridNi, Y=16836857400en_HK
dc.identifier.citeulike630842-

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