Negative Dielectric Constant in Novel Structure of PA-GO Composite /MnO2/Fe3O4/n-Si

Abstract

This manuscript presents a novel structure of PA-GO composite with MnO2/Fe3O4/n-Si. This assembly was arranged by simple technique. It was examined by scanning electron microscope (SEM), X-ray diffraction (XRD) and Raman spectroscopy (RS). The novelty here is that the negative dielectric constant appeared for all considered voltages at the spot point frequencies 1000, 100 and 10 Hz, in spite of all literature proved that the dielectric constant has negative values only at higher frequencies (almost above 1 MHz). Also, the dielectric loss is negative at the higher frequencies at all considered voltages and temperatures. This structure has low dielectric loss tangent (tan δ ranging between 4 to 50) for all investigated voltages and temperatures and also has high rectification ratio reach to 1200 times, and high Rj. The electrical properties of this structure were examined by conventional/dlnI, Nord and Cheung method.