On the microwave absorption of magnetic nanofluids based on barium hexaferrite in the S and X bands prepared by pulsed laser ablation in liquid
V. N. Archana,
Manoj Mani,
Jacob Johny,
S. Vinayasree,
P. Mohanan,
Marco A. Garza-Navarro,
Sadasivan Shaji,
M. R. Anantharaman
Affiliations
V. N. Archana
Department of Physics, Cochin University of Science and Technology, Cochin 682022, India
Manoj Mani
Department of Electronics, Cochin University of Science and Technology, Cochin 682022, India
Jacob Johny
Facultad de Ingenierıa Mecanica y Electrica, Universidad Autonoma de Nuevo Leon, Av. Pedro de Alba s/n, Ciudad Universitaria, San Nicolas de Los Garza, Nuevo Leon 66455, Mexico
S. Vinayasree
Department of Physics, Cochin University of Science and Technology, Cochin 682022, India
P. Mohanan
Department of Electronics, Cochin University of Science and Technology, Cochin 682022, India
Marco A. Garza-Navarro
Facultad de Ingenierıa Mecanica y Electrica, Universidad Autonoma de Nuevo Leon, Av. Pedro de Alba s/n, Ciudad Universitaria, San Nicolas de Los Garza, Nuevo Leon 66455, Mexico
Sadasivan Shaji
Facultad de Ingenierıa Mecanica y Electrica, Universidad Autonoma de Nuevo Leon, Av. Pedro de Alba s/n, Ciudad Universitaria, San Nicolas de Los Garza, Nuevo Leon 66455, Mexico
M. R. Anantharaman
Department of Physics, Cochin University of Science and Technology, Cochin 682022, India
Magnetic nanofluids can be prepared by dispersing surfacted nanoparticles in an appropriate carrier medium. The microwave absorbing properties of a magnetic nanofluid based on barium hexaferrite (BAF) is promising since BAF is a good microwave absorber. Surfacted BAF particles prepared by Pulsed Laser Ablation in Liquid (PLAL) overcome agglomeration and are stable under normal conditions. The evaluation of parameters namely ε′, ε″, μ′ and μ″ (real and imaginary parts of permittivity and permeability) will aid in the determination of the microwave absorbing properties since these parameters can be employed to model the optimum thickness of the absorber for maximum absorption using surface impedance equations. Moreover, the fluid can be coated with the required thicknesses on a surface once these parameters are evaluated and modelled. A magnetic nanofluid based on BAF is synthesized using PLAL and its microwave absorbing properties are evaluated and presented here. It is found that they serve as good absorbers in the S and X bands.
