NDLI: Nano Ferrites Microwave Complex Permeability and Permittivity Measurements by T/R Technique in Waveguide

Content Provider	IEEE Xplore Digital Library
Author	Al-Moayed, N.N. Afsar, M.N. Khan, U.A. McCooey, S. Obol, M.
Copyright Year	1965
Abstract	There is a huge demand to accurately determine the magnetoelectrical properties of particles in the nano-sized regime due to the modern IC technology revolution and biomedical applications. In this paper, we present a microwave waveguide measurement technique for measuring complex permeability and permittivity of expensive nano-sized magnetic powder materials. We used a vector network analyzer to provide a standard TRL calibration for free space inside waveguide measurements. In order to maintain the recommended insertion phase range, a very thin prepared sample was loaded inside the calibrated waveguide. The loaded material's magnetic and dielectric effects were also considered in the cutoff wavelength calculation of the propagation constant of the TE₁₀ wave from the geometrical dimensions of the waveguides. These provisions make the permeability and permittivity measurements more reliable than those found by commonly used techniques. We used six different compounds of nano-sized ferrite powders (Fe₃O₄, CuFe₂O₄, CuFe₂O₄Zn, F₁₂NiO₃Zn, BaFe₁₂O₁₉, and SrFe₁₂O₁₉), in which the average diameter of nano particles is less than 40 nm, for measurement purposes. We measured the complex permeability and permittivity from 3.95 to 5.85 GHz. The results show that the dielectric permittivity of these materials is quite different from that of solid-state materials.
Sponsorship	IEEE Magnetics Society
Starting Page	1768
Ending Page	1772
Page Count	5
File Size	486501
File Format	PDF
ISSN	00189464
Volume Number	44
Issue Number	7
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-07-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Ferrites Microwave theory and techniques Permittivity measurement Biomedical measurements Dielectric materials Dielectric measurements Space technology Permeability measurement Powders Magnetic materials waveguide technique Nano ferrites permeability permittivity
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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