Please use this identifier to cite or link to this item:
Type: Artigo de periódico
Title: Room temperature ferromagnetism in sol-gel prepared Co-doped ZnO
Author: Varshney, P
Srinet, G
Kumar, R
Sajal, V
Sharma, SK
Knobel, M
Chandra, J
Gupta, G
Kulriya, PK
Abstract: We report on the high temperature ferromagnetism in Co-doped ZnO samples with 2%, 4% and 6% nominal Co concentrations prepared by the sol-gel method. X-ray diffraction and X-ray photoelectron spectroscopy analyses confirm the absence of metallic Co clusters or any other impurity phases different from wurtzite-type ZnO. It is also observed that Co has occupied Zn sites. UV-visible absorption studies show an increase in band gap with Co concentration. The field dependence of magnetization exhibited clear ferromagnetism at room temperature with saturation magnetization and coercive field of the order of 0.0066-0.0239 emu/g and 149.09-40.31 Oe, respectively. Increase of saturation magnetization value with Co doping indicated that the ferromagnetism in the samples may be due to percolation of bound magnetic polarons. (C) 2012 Elsevier Ltd. All rights reserved.
Subject: Diluted magnetic semiconductors
Country: Inglaterra
Editor: Elsevier Sci Ltd
Citation: Materials Science In Semiconductor Processing. Elsevier Sci Ltd, v. 15, n. 3, n. 314, n. 318, 2012.
Rights: fechado
Identifier DOI: 10.1016/j.mssp.2012.02.002
Date Issue: 2012
Appears in Collections:Unicamp - Artigos e Outros Documentos

Files in This Item:
File Description SizeFormat 
WOS000306883700014.pdf715.86 kBAdobe PDFView/Open

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