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Heavily loaded ferrite-polymer composites to produce high refractive index materials at centimetre wavelengths

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Parke, Laura, Hooper, Ian R., Hicken, Robert J., Dancer, Claire E. J., Grant, Patrick S., Youngs, Ian J., Sambles, Roy and Hibbins, Alaistair P. (2013) Heavily loaded ferrite-polymer composites to produce high refractive index materials at centimetre wavelengths. APL Materials, Volume 1 (Number 4). Article number 042108. doi:10.1063/1.4824039

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Official URL: http://dx.doi.org/10.1063/1.4824039

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Abstract

A cold-pressing technique has been developed for fabricating composites composed of a polytetrafluoroethylene-polymer matrix and a wide range of volume-fractions of MnZn-ferrite filler (0%–80%). The electromagnetic properties at centimetre wavelengths of all prepared composites exhibited good reproducibility, with the most heavily loaded composites possessing simultaneously high permittivity (180 ± 10) and permeability (23±2). The natural logarithm of both the relative complex permittivity and permeability shows an approximately linear dependence with the volume fraction of ferrite. Thus, this simple method allows for the manufacture of bespoke materials required in the design and construction of devices based on the principles of transformation optics.

Item Type: Journal Article
Subjects: Q Science > QC Physics
T Technology > TS Manufactures
Divisions: Faculty of Science, Engineering and Medicine > Engineering > WMG (Formerly the Warwick Manufacturing Group)
Library of Congress Subject Headings (LCSH): Ferrites (Magnetic materials) , Polymers , Manganese compounds , Refractive index, Zinc compounds, Permeability
Journal or Publication Title: APL Materials
Publisher: American Institute of Physics
Official Date: 4 April 2013
Dates:
DateEvent
4 April 2013Published
Volume: Volume 1
Number: Number 4
Page Range: Article number 042108
DOI: 10.1063/1.4824039
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Open Access
Funder: Engineering and Physical Sciences Research Council (EPSRC), Defence Science and Technology Laboratory (Great Britain), MagDev Limited
Grant number: EP/I034548/1 (EPSRC)

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