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Q‐factor improvement of integrated inductors using high aspect ratio ferromagnetic nanowires
Author(s) -
Hamoir Gael,
Piraux Luc,
Huynen Isabelle
Publication year - 2012
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.26900
Subject(s) - inductor , materials science , inductance , ferromagnetism , ferromagnetic resonance , nanoporous , optoelectronics , microwave , q factor , quality (philosophy) , substrate (aquarium) , nanowire , aspect ratio (aeronautics) , magnetic field , electrical engineering , nanotechnology , engineering , condensed matter physics , physics , telecommunications , magnetization , oceanography , quantum mechanics , voltage , resonator , geology
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. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:1633–1637, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26900