Effects of DC glow discharge air plasma treatment on structural, optical, and dielectric characteristics of Nd0.9Gd0.1FeO3

The well-known orthoferrite Nd_0.9Gd_0.1FeO₃ samples were prepared using solid state reaction methods. The effect of plasma irradiation with different doses (10W, 20W, and 30W) on the structural, optical, and dielectric properties had been discussed in this work. The plasma treated Nd_0.9Gd_0.1FeO₃ sample exhibited more active in surface modification than that of the untreated sample. The absorption spectra and optical band gap of plasma treated sample can be affected due to surface modification. The dielectric spectroscopy showed dose-dependent changes in the dielectric constant and loss tangent at various temperatures and frequencies. The impact of plasma treatment power on dielectric properties revealed optimal results at 20W. At this power level, samples exhibited high dielectric constant values and low tangent loss compared to treatments at both 10W and 30W. From the analysis of the results, it showed that 20W DC power created favorable conditions for particle agglomeration on the surface.