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Tailoring ferromagnetism in chromium-doped zinc oxide

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 concentr...

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Main Authors: Ul Haq, Bakhtiar, Ahmed, Rashid, Goumri-Said, Souraya
Format: Article
Published: IOP Publishing Ltd 2014
Subjects:
QC Physics
Online Access:http://eprints.utm.my/id/eprint/59965/
http://dx.doi.org/10.1088/2053-1591/1/1/016108
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spelling my.utm.599652022-01-24T06:13:32Z http://eprints.utm.my/id/eprint/59965/ Tailoring ferromagnetism in chromium-doped zinc oxide Ul Haq, Bakhtiar Ahmed, Rashid Goumri-Said, Souraya QC Physics 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. IOP Publishing Ltd 2014-03 Article PeerReviewed Ul Haq, Bakhtiar and Ahmed, Rashid and Goumri-Said, Souraya (2014) Tailoring ferromagnetism in chromium-doped zinc oxide. Materials Research Express, 1 (1). 016107-16118. ISSN 2053-1591 http://dx.doi.org/10.1088/2053-1591/1/1/016108 DOI:10.1088/2053-1591/1/1/016108
institution Universiti Teknologi Malaysia
building UTM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Malaysia
content_source UTM Institutional Repository
url_provider http://eprints.utm.my/
topic QC Physics
spellingShingle QC Physics
Ul Haq, Bakhtiar
Ahmed, Rashid
Goumri-Said, Souraya
Tailoring ferromagnetism in chromium-doped zinc oxide
description 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.
format Article
author Ul Haq, Bakhtiar
Ahmed, Rashid
Goumri-Said, Souraya
author_facet Ul Haq, Bakhtiar
Ahmed, Rashid
Goumri-Said, Souraya
author_sort Ul Haq, Bakhtiar
title Tailoring ferromagnetism in chromium-doped zinc oxide
title_short Tailoring ferromagnetism in chromium-doped zinc oxide
title_full Tailoring ferromagnetism in chromium-doped zinc oxide
title_fullStr Tailoring ferromagnetism in chromium-doped zinc oxide
title_full_unstemmed Tailoring ferromagnetism in chromium-doped zinc oxide
title_sort tailoring ferromagnetism in chromium-doped zinc oxide
publisher IOP Publishing Ltd
publishDate 2014
url http://eprints.utm.my/id/eprint/59965/
http://dx.doi.org/10.1088/2053-1591/1/1/016108
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score 13.211869

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