Variation in the magneto-impedance (MI) effect according to the shape of patterned Co30Fe34Ni36 alloys

Authors
Kim, H.K.Kim, D.H.Son, D.R.Jeung, W.Y.
Issue Date
2008-06
Publisher
Seoul National University 501-321
Citation
Journal of Magnetics, v.13, no.2, pp.65 - 69
Abstract
The magneto impedance (MI) behaviors of patterned Co30Fe34Ni36 microwire were investigated with respect to its shape variation. After preparing Co30Fe34Ni36 microwires using electrodeposition and photolithography methods, impedance measurements were conducted to compare the MI ratios of the devices with different aspect ratios. As a result, the anisotropy field and transverse permeability were found to be strongly affected by the aspect ratio of the device. The external field value at the maximum impedance and maximum sensitivity of the device was found to increase with increasing device width, which was attributed to the increased transverse anisotropy with decreasing aspect ratio. While an increase in the thickness also contributed to an increase in the MI ratio, a variation in the thickness not only increased the anisotropic field, but the variation in the MI ratio was as also affected by the skin effect. Conversely, the MI ratios of the present devices were hardly affected by variations in the length. Considering the typical aspect ratios of our devices, It was expected that the length effect would emerge when the aspect ratio was reduced to less than 10. Nevertheless, our results show that for the practical application of MI devices, the MI characteristics can be optimized by tailoring the aspect ratio of the devices. ? 2008 Journal of Magnetics.
Keywords
Anisotropy field; Magneto impedance (MI); Permeability; Skin effect
ISSN
1226-1750
URI
https://pubs.kist.re.kr/handle/201004/133467
DOI
10.4283/JMAG.2008.13.2.065
Appears in Collections:
KIST Article > 2008
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