NDLI: Electronic measurement of single-domain magnetic particle concentration

Content Provider	IEEE Xplore Digital Library
Author	Karis, T.
Copyright Year	1965
Abstract	A radio frequency oscillator with the coil of the resonant circuit wound around a tube containing a suspension of single-domain magnetic particles was employed to study the effect of the volume fraction of suspended particles on the bulk permeability with two types of suspending fluid and three different types of magnetic oxides. For a given particle and suspending fluid the permeability (measured as the inverse square oscillator frequency) of the suspension was linearly proportional to the volume fraction of particles in suspension. Volume fraction was maintained less than 10%. The level of the permeability was shifted by the suspending fluid, and the fractional increase in permeability with volume fraction was determined by the difference between the specific contribution of the particles and that of the suspending fluid to the permeability. Temperature effects on the oscillator frequency from 20 to 35 C were found to contribute less than 0.03% error in particle volume measurement by this method.
Sponsorship	IEEE Magnetics Society
Starting Page	665
Ending Page	667
Page Count	3
File Size	407119
File Format	PDF
ISSN	00189464
Volume Number	22
Issue Number	5
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1986-09-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Particle measurements Magnetic particles Magnetic levitation Permeability Oscillators Volume measurement Radio frequency Coils RLC circuits Wounds
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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