The magnetic ordering in high magnetoresistance Mn-doped ZnO thin films

Handle URI:
http://hdl.handle.net/10754/606855
Title:
The magnetic ordering in high magnetoresistance Mn-doped ZnO thin films
Authors:
Venkatesh, S.; Baras, Abdulaziz; Lee, J.-S.; Roqan, Iman S. ( 0000-0001-7442-4330 )
Abstract:
We studied the nature of magnetic ordering in Mn-doped ZnO thin films that exhibited ferromagnetism at 300 K and superparamagnetism at 5 K. We directly inter-related the magnetisation and magnetoresistance by invoking the polaronpercolation theory and variable range of hopping conduction below the metal-to-insulator transition. By obtaining a qualitative agreement between these two models, we attribute the ferromagnetism to the s-d exchange-induced spin splitting that was indicated by large positive magnetoresistance (∼40 %). Low temperature superparamagnetism was attributed to the localization of carriers and non-interacting polaron clusters. This analysis can assist in understanding the presence or absence of ferromagnetism in doped/un-doped ZnO.
KAUST Department:
Physical Sciences and Engineering (PSE) Division
Citation:
The magnetic ordering in high magnetoresistance Mn-doped ZnO thin films 2016, 6 (3):035019 AIP Advances
Publisher:
AIP Publishing
Journal:
AIP Advances
Issue Date:
24-Mar-2016
DOI:
10.1063/1.4944954
Type:
Article
ISSN:
2158-3226
Sponsors:
The authors wish to thank KAUST for the financial support. Synchrotron studies were carried out at the SSRL, a Directorate of SLAC and an Office of Science User Facility operated for the US DOE Office of Science by Stanford University. J.S.L. acknowledges partial funding from the Global Research Laboratory program of the Korean Ministry of Education, Science, and Technology (MEST). The authors also thank Dr. Paul R Edwards and Prof. Robert W Martin for using EPMA facilities at University of Strathclyde.
Additional Links:
http://scitation.aip.org/content/aip/journal/adva/6/3/10.1063/1.4944954
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorVenkatesh, S.en
dc.contributor.authorBaras, Abdulazizen
dc.contributor.authorLee, J.-S.en
dc.contributor.authorRoqan, Iman S.en
dc.date.accessioned2016-04-24T06:40:52Zen
dc.date.available2016-04-24T06:40:52Zen
dc.date.issued2016-03-24en
dc.identifier.citationThe magnetic ordering in high magnetoresistance Mn-doped ZnO thin films 2016, 6 (3):035019 AIP Advancesen
dc.identifier.issn2158-3226en
dc.identifier.doi10.1063/1.4944954en
dc.identifier.urihttp://hdl.handle.net/10754/606855en
dc.description.abstractWe studied the nature of magnetic ordering in Mn-doped ZnO thin films that exhibited ferromagnetism at 300 K and superparamagnetism at 5 K. We directly inter-related the magnetisation and magnetoresistance by invoking the polaronpercolation theory and variable range of hopping conduction below the metal-to-insulator transition. By obtaining a qualitative agreement between these two models, we attribute the ferromagnetism to the s-d exchange-induced spin splitting that was indicated by large positive magnetoresistance (∼40 %). Low temperature superparamagnetism was attributed to the localization of carriers and non-interacting polaron clusters. This analysis can assist in understanding the presence or absence of ferromagnetism in doped/un-doped ZnO.en
dc.description.sponsorshipThe authors wish to thank KAUST for the financial support. Synchrotron studies were carried out at the SSRL, a Directorate of SLAC and an Office of Science User Facility operated for the US DOE Office of Science by Stanford University. J.S.L. acknowledges partial funding from the Global Research Laboratory program of the Korean Ministry of Education, Science, and Technology (MEST). The authors also thank Dr. Paul R Edwards and Prof. Robert W Martin for using EPMA facilities at University of Strathclyde.en
dc.language.isoenen
dc.publisherAIP Publishingen
dc.relation.urlhttp://scitation.aip.org/content/aip/journal/adva/6/3/10.1063/1.4944954en
dc.rightsArchived with thanks to AIP Advancesen
dc.titleThe magnetic ordering in high magnetoresistance Mn-doped ZnO thin filmsen
dc.typeArticleen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.identifier.journalAIP Advancesen
dc.eprint.versionPublisher's Version/PDFen
dc.contributor.institutionStanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USAen
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)en
kaust.authorVenkatesh, S.en
kaust.authorBaras, A.en
kaust.authorRoqan, Iman S.en
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