Electromagnetic characterization of microwave sintered Sr1-xCaxMnO3 (0.0 ≤ x ≤ 0.4) thick films

Abstract

Electromagnetic characteristics of microwave sintered strontium calcium manganites thick film with variation in calcium content have been investigated. The X-ray diffraction analysis reveals tetragonal perovskite structure for all the compositions. The grain size increases with the increase in calcium content. The microwave absorption, complex permittivity, permeability and conductivity are reported in the frequency range of 8.2–18 GHz. The absorption loss is larger in Ku band while insertion loss is larger in X band. The permittivity, permeability and microwave conductivity decreases from X-band to Ku-band. The almost identical values of real part of permittivity and permeability indicate possible application as materials for impedance matching

Structural, electrical and microwave properties of (Sr0.6Ca0.4) (CoyMn1−y) O3 (0.2 ≤ y ≤ 1.0) thick film ceramics

“…But in case of Ku band, variation in the values of = is observed as Co concentration increases. The experimental set up and formula for calculating complex permittivity are well explained in the study by Pawar et al, 2013. Figure 6 shows the variation in permittivity loss (Љ) with frequency for (Sr 0.6 Ca 0.4 ) (Co y Mn 1Ϫy ) O 3 (0.2 Յ y Յ 1.0) thick film. From the figure, it is observed that permittivity loss (=) decreases with increase in frequency due to intrinsic electric dipoles and interfacial polarization.…”

“…The experimental set up and formula for calculating complex permittivity and permeability are well explained in Pawar et al (2013). Complex permittivity represents the electronic properties of a material subjected to an electromagnetic field.…”