volume | PIER Journals

Abstract

The effect of copper on the microwave absorption, conductivity and complex permittivity of fritless Ni_(1-x)Cu_xMn₂O₄ (x=0,0.4,0.8,1) thick film on alumina have been investigated in the 8-18 GHz frequency range. The structural changes have been identified by scanning electron microscope (SEM), FTIR and RAMAN scattering spectroscopy. The microwave conductivity and permittivity increase as copper content increases. The fritless Ni_(1-x)Cu_xMn₂O₄ (0≤x≤1) thick film with x=0.4 shows best absorption properties, though all the other compositions also show good absorption in a large frequency range. The microwave conductivity increases from 1S/cm to 951 S/cm due to copper and the dielectric constant (ε) increases from 7 to 19.5.

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Dr. Rupali N. Jadhav

Dr. Vijaya Puri