Effects of particle size on magnetic and dielectric properties of ferrites at microwave and millimeterwave frequencies

Constitutive material properties of micro-size and nano-size hexagonal ferrites have been studied. Two different measurements techniques have been applied to characterize the samples in the broad frequency range from 1.7 GHz to 120 GHz. X-ray diffraction studies have been carried out to study the structure of the particles. The possible reasons for the difference in behavior of nano-powder and micro-powder sample have been discussed. A thorough error analysis has been presented to account for experimental inaccuracy.