DSpace
 

iRepository at Perpustakaan UniMAP >
Journal Articles >
School of Microelectronic Engineering (Articles) >

Please use this identifier to cite or link to this item: http://dspace.unimap.edu.my:80/dspace/handle/123456789/8423

Title: Ab-initio calculations of Co-based diluted magnetic semiconductors Cd1-x Cox X (X=S, Se, Te)
Authors: Saeed, Y.
Nazir, S.
Shaukat, A.
Reshak, Ali H.
Keywords: Ab initio calculations;Density functional theory;Dilute magnetic semiconductors;Electronic and magnetic properties
Issue Date: Oct-2010
Publisher: Elsevier B. V.
Citation: Journal of Magnetism and Magnetic Materials, vol.322 (20), October 2010, pages 3214-3222
Abstract: Ab-initio calculations are performed to investigate the structural, electronic and magnetic properties of spin-polarized diluted magnetic semiconductors composed of II-VI compounds Cd1-x Cox X (X=S, Se, Te) at x=0.25. From the calculated results of band structure and density of states, the half-metallic character and stability of ferromagnetic state for Cd1-x Cox S, Cd1-x Cox Se and Cd1-x Cox Te alloys are determined. It is found that the tetrahedral crystal field gives rise to triple degeneracy t2g and double degeneracy eg . Furthermore, we predict the values of spinexchange splitting energies +x (d) and +x (p-d) and exchange constants N0 α and N0 β produced by the Co 3d states. Calculated total magnetic moments and the robustness of half-metallicity of Cd1-x Cox X (X=S, Se, Te) with respect to the variation in lattice parameters are also discussed. We also extend our calculations to x=0.50, 0.75 for S compounds in order to observe the change due to increase in Co.
Description: Link to publisher' homepage at http://www.elsevier.com/
URI: http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TJJ-5093N8V-1&_user=1659113&_coverDate=10%2F31%2F2010&_rdoc=1&_fmt=high&_orig=search&_sort=d&_docanchor=&view=c&_acct=C000054070&_version=1&_urlVersion=0&_userid=1659113&md5=dbc1ede77c62934ccba14b363ca45f13
http://hdl.handle.net/123456789/8423
ISSN: 0304-8853
Appears in Collections:School of Microelectronic Engineering (Articles)

Files in This Item:

File Description SizeFormat
Ab.pdf57.49 kBAdobe PDFView/Open
View Statistics

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

 

Valid XHTML 1.0! Perpustakaan Tuanku syed Faizuddin Putra, Kampus Pauh Putra, Universiti Malaysia Perlis, 02600, Arau Perlis
TEL: +604-9885420 | FAX: +604-9885405 | EMAIL: rujukan@unimap.edu.my Feedback