Emergent ferromagnetism in ZnO/Al2O3 core-shell nanowires: Towards oxide spinterfaces

Handle URI:
http://hdl.handle.net/10754/552323
Title:
Emergent ferromagnetism in ZnO/Al2O3 core-shell nanowires: Towards oxide spinterfaces
Authors:
Xing, G. Z.; Wang, D. D.; Cheng, C.-J.; He, M.; Li, S.; Wu, Tao ( 0000-0003-0845-4827 )
Abstract:
We report that room-temperature ferromagnetism emerges at the interface formed between ZnO nanowire core and Al2O3 shell although both constituents show mainly diamagnetism. The interface-based ferromagnetism can be further enhanced by annealing the ZnO/Al2O3 core-shell nanowires and activating the formation of ZnAl2O4 phase as a result of interfacial solid-state reaction. High-temperature measurements indicate that the magnetic order is thermally stable up to 750 K. Transmission electron microscopy studies reveal the annealing-induced jagged interfaces, and the extensive structural defects appear to be relevant to the emergent magnetism. Our study suggests that tailoring the spinterfaces in nanostructure-harnessed wide-band-gap oxides is an effective route towards engineered nanoscale architecture with enhanced magnetic properties.
KAUST Department:
Physical Sciences and Engineering (PSE) Division
Citation:
Emergent ferromagnetism in ZnO/Al2O3 core-shell nanowires: Towards oxide spinterfaces 2013, 103 (2):022402 Applied Physics Letters
Publisher:
AIP Publishing
Journal:
Applied Physics Letters
Issue Date:
8-Jul-2013
DOI:
10.1063/1.4813217
Type:
Article
ISSN:
00036951
Additional Links:
http://scitation.aip.org/content/aip/journal/apl/103/2/10.1063/1.4813217
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorXing, G. Z.en
dc.contributor.authorWang, D. D.en
dc.contributor.authorCheng, C.-J.en
dc.contributor.authorHe, M.en
dc.contributor.authorLi, S.en
dc.contributor.authorWu, Taoen
dc.date.accessioned2015-05-05T14:46:59Zen
dc.date.available2015-05-05T14:46:59Zen
dc.date.issued2013-07-08en
dc.identifier.citationEmergent ferromagnetism in ZnO/Al2O3 core-shell nanowires: Towards oxide spinterfaces 2013, 103 (2):022402 Applied Physics Lettersen
dc.identifier.issn00036951en
dc.identifier.doi10.1063/1.4813217en
dc.identifier.urihttp://hdl.handle.net/10754/552323en
dc.description.abstractWe report that room-temperature ferromagnetism emerges at the interface formed between ZnO nanowire core and Al2O3 shell although both constituents show mainly diamagnetism. The interface-based ferromagnetism can be further enhanced by annealing the ZnO/Al2O3 core-shell nanowires and activating the formation of ZnAl2O4 phase as a result of interfacial solid-state reaction. High-temperature measurements indicate that the magnetic order is thermally stable up to 750 K. Transmission electron microscopy studies reveal the annealing-induced jagged interfaces, and the extensive structural defects appear to be relevant to the emergent magnetism. Our study suggests that tailoring the spinterfaces in nanostructure-harnessed wide-band-gap oxides is an effective route towards engineered nanoscale architecture with enhanced magnetic properties.en
dc.publisherAIP Publishingen
dc.relation.urlhttp://scitation.aip.org/content/aip/journal/apl/103/2/10.1063/1.4813217en
dc.rightsArchived with thanks to Applied Physics Lettersen
dc.titleEmergent ferromagnetism in ZnO/Al2O3 core-shell nanowires: Towards oxide spinterfacesen
dc.typeArticleen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.identifier.journalApplied Physics Lettersen
dc.eprint.versionPublisher's Version/PDFen
dc.contributor.institutionDivision of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singaporeen
dc.contributor.institutionSchool of Materials Science and Engineering, The University of New South Wales, Sydney, New South Wales 2052, Australiaen
kaust.authorWu, Taoen
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