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

Frequency dependent complex magnetic permeability is determined for a laboratory synthesized magnetic fluid having magnetite nanoparticles in the frequency range 0.3 MHz to 3 GHz. The effect of particle concentration, static magnetic field strength and field orientation over dielectric properties of magnetic fluid is studied. The discussion in this paper indicates that loss tangent (tan δ) can be controlled using these parameters. These fluids...