Abstract
Magnetic and dielectric properties of sol-gel auto combustion processed soft spinel nanoferrite (NZFO) and hexa nanoferrite (Co2Z) were investigated for microwave antenna applications in the frequency range from 1.5 GHz to 3.5 GHz. Selection of dopants and optimized physical conditions have been used to control the high frequency electromagnetic properties of soft NZFO and Co2Z nanoparticles. At frequency 3.5 GHz the magnetic and electric losses of single phased Co2Z are 0.006, 0.002 and for NZFO are 0.004, 0.0018, respectively. The microwave measurements are supported by magnetization data and Mössbauer analysis.
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