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Defect-mediated ferromagnetism in ZnO:Mn nanorods

Yilmaz, S., McGlynn, Enda orcid logoORCID: 0000-0002-3412-9035, Bacaksiz, E. and Bogan, Justin (2014) Defect-mediated ferromagnetism in ZnO:Mn nanorods. Applied Physics A: Materials Science & Processing, 115 (1). pp. 313-321. ISSN 0947-8396

In this work, the structural, chemical and magnetic properties of ZnO:Mn nanorods were investigated. Firstly, well-aligned ZnO nanorods with their long axis parallel to the crystalline c-axis were successfully grown by the vapor phase transport technique on Si substrates coated with a ZnO buffer layer. Mn metal was then diffused into these nanorods at different temperatures in vacuum. From SEM results, ZnO:Mn nanorods were observed to have diameters of ~100 nm and lengths of 4 µm. XPS analysis showed that the Mn dopant substituted into the ZnO matrix with a valence state of +2. Magnetic measurements performed at room temperature revealed that undoped ZnO nanorods exhibit ferromagnetic behavior which may be related to oxygen vacancy defect-mediated d0 ferromagnetism. ZnO:Mn samples were seen to show an excess room temperature ferromagnetism that is attributed to the presence of oxygen vacancy defects forming bound magnetic polarons involving Mn.
Item Type:Article (Published)
Uncontrolled Keywords:ZnO; Nanorod; Magnetism
Subjects:Physical Sciences > Spectrum analysis
Physical Sciences > Nanotechnology
Physical Sciences > Semiconductors
Physical Sciences > Crystallography
DCU Faculties and Centres:Research Institutes and Centres > National Centre for Plasma Science and Technology (NCPST)
DCU Faculties and Schools > Faculty of Science and Health > School of Physical Sciences
Publisher:Springer Verlag
Official URL:http://dx.doi.org/10.1007/s00339-013-7817-x
Copyright Information:© 2014 Springer-Verlag The original publication is available at www.springerlink.com
Use License:This item is licensed under a Creative Commons Attribution-NonCommercial-Share Alike 3.0 License. View License
ID Code:19922
Deposited On:17 Apr 2014 10:14 by Enda Mcglynn . Last Modified 19 Mar 2019 14:27

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