DSpace
 

EPrints@IIT Delhi >
Faculty Research Publicatons  >
Physics >

Please use this identifier to cite or link to this item: http://eprint.iitd.ac.in/handle/2074/941

Title: Giant magnetoresistance and magnetic properties of electrodeposited Cu–Co granular films
Authors: Pattanaik, Gyana R
Pandya, Dinesh K
Kashyap, Subhash C
Keywords: Magnetoresistance
Electrodeposition
Granular film
Superparamagnetism
Issue Date: 2001
Citation: Journal of Alloys and Compounds, 326(1-2), 260–264
Abstract: Cu–Co granular films have been prepared by galvanostatic dc electrodeposition in a single sulphate bath. The magnetoresistance ratio (MR5h(R 2R ) /R j3100) increased with increase in annealing temperature until 4508C, beyond which MR starts decreasing. Lower H 0 0 coercivity values along with non-saturating behaviour of the room temperature magnetization curves indicated the presence of an appreciable amount of superparamagnetic clusters. The average cluster size was calculated by fitting the superparamagnetic component of magnetization to Langevin equation. The average radius of the Co clusters (assuming spherical shape) was calculated to be 1.87 nm for an as-deposited film and 1.57 nm for a film annealed at 4008C for 1 h. The lowering of average cluster size with increase in annealing temperature in the metastable films is attributed to the segregation of many new (smaller) Co clusters.
URI: http://eprint.iitd.ac.in/dspace/handle/2074/941
Appears in Collections:Physics

Files in This Item:

File Description SizeFormat
pattaniakgia2001.pdf362.42 kBAdobe PDFView/Open
View Statistics

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

 

Valid XHTML 1.0! DSpace Software Copyright © 2002-2010  Duraspace - Feedback