Tailoring ferromagnetism in chromium-doped zinc oxide

Handle URI:
http://hdl.handle.net/10754/622481
Title:
Tailoring ferromagnetism in chromium-doped zinc oxide
Authors:
Haq, Bakhtiar Ul; Ahmed, Rashid; Goumri-Said, Souraya
Abstract:
The simultaneous manipulation of both charge and spin has made diluted magnetic semiconductors (DMS) a potential material for the fabrication of spintronic devices. We report DMSs based on ZnO doped with Cr in wurtzite (WZ) and zinc-blend (ZB) geometries. The injection of Cr impurities at a concentration of 6.25% has successfully tuned ferromagnetism in ZnO. To recognize the nature of magnetic interactions, two spatial configurations are investigated, where the impurity atoms are placed at minimum and maximum separation distances. The material favors the short-range magnetic coupling and has a tendency towards Cr clustering. The injection of a Cr impurity into ZnO strongly influences the electronic properties in terms of band structure, dependent on the impurity spatial distribution. It is half metallic for both structural geometries when impurity atoms have minimum separation and is metallic when they are placed far apart. Moreover, replacing Zn with Cr does not show a significant effect on the structural geometries. Our results endorse that Cr:ZnO can be efficiently used for spin-polarized transport and other spin-dependent applications in both hexagonal and cubic phases.
KAUST Department:
Physical Sciences and Engineering (PSE) Division
Citation:
Ul Haq B, Ahmed R, Goumri-Said S (2014) Tailoring ferromagnetism in chromium-doped zinc oxide. Materials Research Express 1: 016108. Available: http://dx.doi.org/10.1088/2053-1591/1/1/016108.
Publisher:
IOP Publishing
Journal:
Materials Research Express
Issue Date:
11-Mar-2014
DOI:
10.1088/2053-1591/1/1/016108
Type:
Article
ISSN:
2053-1591
Sponsors:
The first two authors would like to thank the MOHE of Malaysia and UTM for financial support of this research through Grant No. R.J130000.7826.4F113.
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorHaq, Bakhtiar Ulen
dc.contributor.authorAhmed, Rashiden
dc.contributor.authorGoumri-Said, Sourayaen
dc.date.accessioned2017-01-02T09:28:33Z-
dc.date.available2017-01-02T09:28:33Z-
dc.date.issued2014-03-11en
dc.identifier.citationUl Haq B, Ahmed R, Goumri-Said S (2014) Tailoring ferromagnetism in chromium-doped zinc oxide. Materials Research Express 1: 016108. Available: http://dx.doi.org/10.1088/2053-1591/1/1/016108.en
dc.identifier.issn2053-1591en
dc.identifier.doi10.1088/2053-1591/1/1/016108en
dc.identifier.urihttp://hdl.handle.net/10754/622481-
dc.description.abstractThe simultaneous manipulation of both charge and spin has made diluted magnetic semiconductors (DMS) a potential material for the fabrication of spintronic devices. We report DMSs based on ZnO doped with Cr in wurtzite (WZ) and zinc-blend (ZB) geometries. The injection of Cr impurities at a concentration of 6.25% has successfully tuned ferromagnetism in ZnO. To recognize the nature of magnetic interactions, two spatial configurations are investigated, where the impurity atoms are placed at minimum and maximum separation distances. The material favors the short-range magnetic coupling and has a tendency towards Cr clustering. The injection of a Cr impurity into ZnO strongly influences the electronic properties in terms of band structure, dependent on the impurity spatial distribution. It is half metallic for both structural geometries when impurity atoms have minimum separation and is metallic when they are placed far apart. Moreover, replacing Zn with Cr does not show a significant effect on the structural geometries. Our results endorse that Cr:ZnO can be efficiently used for spin-polarized transport and other spin-dependent applications in both hexagonal and cubic phases.en
dc.description.sponsorshipThe first two authors would like to thank the MOHE of Malaysia and UTM for financial support of this research through Grant No. R.J130000.7826.4F113.en
dc.publisherIOP Publishingen
dc.subjectDFTen
dc.subjectFerromagnetic materialsen
dc.subjectMagnetic impurity interactionsen
dc.subjectSpintronicsen
dc.subjectZinc oxideen
dc.titleTailoring ferromagnetism in chromium-doped zinc oxideen
dc.typeArticleen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.identifier.journalMaterials Research Expressen
dc.contributor.institutionDepartment of Physics, Faculty of Science, Universiti Teknologi Malaysia, UTM Skudai, Johor, 81310, Malaysiaen
kaust.authorGoumri-Said, Sourayaen
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