Solubility of Co clusters in Co-implanted ZnO thin films by 200 MeV Ag15+ ions irradiation

Title
Solubility of Co clusters in Co-implanted ZnO thin films by 200 MeV Ag15+ ions irradiation
Authors
Khan, M. WasiKumar, RaviKhan, M. A. MajeedAngadi, BasavarajJung, Y. S최원국Srivastava, J. P.
Issue Date
2009-09
Publisher
Semiconductor science and technology
Citation
VOL 24, NO 9, 095011-1-095011-6
Abstract
We have investigated the structural, electrical resistivity, pink noise (1/f noise) and magnetic properties of 200 MeV Ag15+ ions (fluence ∼1 × 1012 ions cm−2) irradiated Co-implanted ZnO thin films. The ZnO films were grown on Al2O3 substrate by the PA-MBE technique and 80 keV Co ion implantation with 1 × 1016 ions cm−2 dose value. The structural studies of an unirradiated film show the presence of Co clusters, which dissolve in the ZnO matrix on swift heavy ion (SHI) irradiation. The temperature-dependent electrical resistivity plots of pristine (unirradiated) and irradiated films demonstrated semiconducting nature. The resistivity data were fitted in the Mott’s variable range hopping (VRH) model and the activation energies were estimated. The magnitude of normalized noise SV /V2 increases with decrease in temperature and estimated Hooge’s parameters have higher values as compared to other semiconductors. We observe a clear magnetic hysteresis loop with coercivity ∼65 Oe for both the films at room temperature, establishing the ferromagnetic nature. The correlation between the electrical transport and magnetic properties in the present system formulates it to be a potential aspirant for the spintronics-oriented devices.
URI
http://pubs.kist.re.kr/handle/201004/37013
ISSN
0268-1242
Appears in Collections:
KIST Publication > Article
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE