Please use this identifier to cite or link to this item:
Title: Exchange bias effects in ferromagnetic wires
Authors: Husain, M.K.
Adeyeye, A.O. 
Wang, C.C. 
Ng, V. 
Low, T.S. 
Keywords: Exchange bias
Magnetic wires
Issue Date: Dec-2003
Citation: Husain, M.K., Adeyeye, A.O., Wang, C.C., Ng, V., Low, T.S. (2003-12). Exchange bias effects in ferromagnetic wires. Journal of Magnetism and Magnetic Materials 267 (2) : 191-196. ScholarBank@NUS Repository.
Abstract: We have investigated the exchange bias effect in micron-sized ferromagnetic wires made from Co and Ni80Fe20 films. The wires were fabricated using optical lithography, metallization by sputtering and lift-off technique. Magnetotransport measurements were performed at temperatures ranging from 3 to 300 K. We observed marked changes in the magnetoresistance (MR) properties as the temperature is varied. At 300 K, the field at which the sharp peak occurs corresponding to the magnetization reversal of the Co wires is 167 Oe and is symmetrical about the origin. As the temperature was decreased to 3 K, we observed a shift in the peak positions of the MR characteristics for both the forward and reverse field sweeps corresponding to a loop shift of 582 Oe in the field axis. The asymmetric shift in the MR loops at low temperatures clearly indicates the exchange bias between ferromagnetic (Co) and antiferromagnetic parts (Co-oxide at the surfaces) from natural oxidation. Ni80Fe20 wires of the same geometry showed similar effect with a low exchange bias field. The onset of exchange biasing effect is found to be 70 and 15 K for the Co and Ni80Fe 20 wires, respectively. A striking effect is the existence of exchange biasing effect from the sidewalls of the wires even when the wires were capped with Au film. © 2003 Elsevier Science B.V. All rights reserved.
Source Title: Journal of Magnetism and Magnetic Materials
ISSN: 03048853
DOI: 10.1016/S0304-8853(03)00352-4
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.


checked on Sep 25, 2020


checked on Sep 17, 2020

Page view(s)

checked on Sep 20, 2020

Google ScholarTM



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