Q-factor improvement of integrated inductors using high aspect ratio ferromagnetic nanowires
(2012) Microwave & Optical Technology Letters — Vol. 54, n° 7, p. 1633-1637 (2012)
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- Abstract
- We fabricated a planar inductor onto a substrate made of high aspect ratio ferromagnetic nickel nanowires in a self-supported alumina nanoporous membrane. We observe a simultaneous increase of the inductance value and the quality factor up to 7 GHz, thanks to the large amount of ferromagnetic material and the nanoscale of the wires limiting conducting losses. Our device shows the largest increase reported in the literature for such ferromagnetic inductors: +30% for the inductance value and +23% for the quality factor. Even more, this technology offers great advantages as an easy integration in miniaturized topologies and its tunability to a magnetic field to broaden the desired frequency range. Our analytical model predicts that the increase of quality factor can be maximized up to 35% by an optimization of the pores filling.
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Citations
Hamoir, G., Piraux, L., & Huynen, I. (2012). Q-factor improvement of integrated inductors using high aspect ratio ferromagnetic nanowires. Microwave & Optical Technology Letters, 54(7), 1633-1637. https://doi.org/10.1002/mop.26900 (Original work published 2012)