Tunable magneto-dielectric properties of magnetic fluid at radio-microwave frequencies

Jadav, Mudra; Bhatnagar, S. P.

doi:10.1016/j.jmmm.2019.166127

Cited by 3 publications

(1 citation statement)

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“…In our previous report [27], the effect of particle concentration, static magnetic field and it's orientation on complex magnetic permeability of magnetic fluid was studied. In this paper, the effect of particle size variation over complex magnetic permeability, microwave absorption, and reflection loss in magnetic fluid is reported.…”

Section: Introductionmentioning

confidence: 99%

Particle Size Controlled Magnetic Loss in Magnetite Nanoparticles in RF-Microwave Region

Jadav

Bhatnagar

2020

IEEE Trans. Magn.

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Frequency dependant complex magnetic permeability is used to understand RF-microwave behaviour of magnetic nanoparticles in the frequency range 250 MHz to 3 GHz. The stable dispersions of Fe3O4 nanoparticles with mean size varying between 11 to 16 nm are prepared for this purpose. The effect of mean particle size and external static magnetic field over microwave absorption properties of magnetic fluid is studied. It is observed that frequency of ferrimagnetic resonance ( ), frequency of maximum absorption ( ), loss tangent (tan ) and reflection loss ( ) can be controlled by modifying mean particle size and strength of applied external static magnetic field. This kind of study can be useful for radiomicrowave devices like tunable attenuator, EM sheilder, and other applications like Hyperthermia.

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Section: Introductionmentioning

confidence: 99%