Title :
Permittivity Model for Ferromagnetic Nanowired Substrates
Author :
Spiegel, Judith ; De La Torre, Joaquìn ; Darques, Michaël ; Piraux, Luc ; Huynen, Isabelle
Author_Institution :
Univ. Catholique de Louvain, Louvain-la-Neuve
fDate :
7/1/2007 12:00:00 AM
Abstract :
This letter presents the influence of ferromagnetic nanowires on permittivity and losses on a so-filled membrane. For this purpose a theoretical permittivity model has been developed by considering geometrical parameters of the substrate such as the porosity of the membrane and the height of the nanowires. It has been validated by microstrip line measurements on a composite substrate filled with cobalt nanowires. The ferromagnetic nanowires enhance the permittivity, but give no further contribution to the losses beyond the ferromagnetic resonance. This is confirmed by measurements on a similar topology including non ferromagnetic copper nanowires.
Keywords :
ferromagnetic materials; microstrip lines; nanowires; permittivity; cobalt nanowires; composite substrate; ferromagnetic nanowired substrates; ferromagnetic resonance; microstrip line measurements; permittivity model; polycarbonate template; Biomembranes; Cobalt; Copper; Dielectric substrates; Frequency; Magnetic materials; Microstrip; Nanowires; Permittivity measurement; Wire; Artificial material; ferromagnetic nanowire; losses; permittivity; polycarbonate template;
Journal_Title :
Microwave and Wireless Components Letters, IEEE
DOI :
10.1109/LMWC.2007.899303
