Please use this identifier to cite or link to this item: https://doi.org/10.1109/TMAG.2009.2031981
Title: Performance of tunable magnetic inductors in relation to the magnetic layer thickness and an applied longitudinal magnetic field in electrodeposition of the magnetic layer
Authors: Ning, N. 
Li, X.P. 
Keywords: Inductors
Magnetic films
Magnetoimpedance
Tunable circuits and devices
Issue Date: Feb-2010
Source: Ning, N., Li, X.P. (2010-02). Performance of tunable magnetic inductors in relation to the magnetic layer thickness and an applied longitudinal magnetic field in electrodeposition of the magnetic layer. IEEE Transactions on Magnetics 46 (2) : 337-340. ScholarBank@NUS Repository. https://doi.org/10.1109/TMAG.2009.2031981
Abstract: A tunable magnetic inductor based on magnetoimpedance effect, with low dc current/power consumption for continuous inductance tuning, has been reported recently. To optimize the tunability and quality factor of the tunable magnetic inductor of composite wire structure, the effects of the thickness of the magnetic layer and an applied longitudinal magnetic field in electrodeposition of the magnetic layer on the inductance and quality factor of tunable magnetic inductor have been investigated in this study. Specimens with a range of thicknesses of the magnetic coating layer were produced by electrodeposition. Also, specimens from electrodeposition in an applied longitudinal magnetic field varying from 0600 Oe were produced. The characterization results indicate that there is a critical thickness for the coating layer, below which the tunability under a weak bias magnetic field (Hex) is high (up to 50.6% at 100 kHz and 5.3% at 100 MHz, when Hex is 1.7 Oe) and is proportional to the magnetic coating layer thickness tm, and above which the tunability under a weak bias field is low (up to 6.6% at 100 kHz and 2.5% at 100 MHz, when Hex is 1.7 Oe) and is inversely proportional to t m. The variation of the quality factor follows the change of Fe% in the Ni-Fe layer, and the longitudinal field imposed during the electrodeposition amplifies such change by improving the uniformity of the plated layer. An averaged 23% increase of the quality factor was observed for specimens fabricated with imposed field at 143 Oe, and the inductance tunablity was significantly higher than previously reported results. © 2010 IEEE.
Source Title: IEEE Transactions on Magnetics
URI: http://scholarbank.nus.edu.sg/handle/10635/86051
ISSN: 00189464
DOI: 10.1109/TMAG.2009.2031981
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