Defect dipole polarization mechanism in low-dimensional europium substituted Al0.8La0.2TiO3 nanostructures

Structural and Dielectric Properties of (1-x) (Al0.2La0.8TiO3) + (x) (BiZnFeO3) (x = 0.2 − 0.8) nanocomposites

“…Consequently, the negative dielectric constant, and dielectric loss will be achieved. This behavior can be considered as diaelectricity nature which is like the diamagnetism [2]. That means, in case of diamagnetic nature of a magnetic specimen, the magnetization will be developed opposite to the direction of applied magnetic field.…”

“…The similar observations were evidenced in the case of x = 0.6 nanocomposite during 6 -8 MHz frequency. From these results, it was understood that the nanocomposites (x = 0.2, 0.4, and 0.8) exhibiting the high dielectric constant can be suited for high charge storage capacitor applications [2]. Likewise, the x = 0.6 sample offering negative dielectric behavior can provide applications in waveguides, filters, antenna, electromagnetic cloaking devices, and perfect microwave absorbers [2].…”

“…Even the applications of several perovskite nanocomposites were extended to biomedical, magnetic, electromagnetic, microwave, ferroelectric, charge storage etc., [1]. Few of the above merits were seen in the case of LaTiO3 [2]. In the literature [1 -4], AlLaTiO3 was studied extensively by several researchers for structural, optical, morphological, electrical, and dielectric properties.…”

“…Further, the nanocomposites were synthesized including the AlLaTiO3, and studied for the similar properties. These materials were of ALTBT [1], ALTBFO [5,6], LCET [7], and AELTO [2] revealing the nanorod formation, negative dielectric behavior, and defect dipole formation, respectively. This indicated a fact that the more advanced properties were achieved on mixing the barium titanate, bismuth iron oxide, and europium oxide.…”

Structural and Dielectric Properties of (1-x) (Al0.2La0.8TiO3) + (x) (BiZnFeO3) (x = 0.2 - 0.8) Nanocomposites

“…In the M' -log ω, and M" -log ω plots (Fig.10) [M' = ε'/(ε' 2 +ε" 2 ) (real part), and M" = ε"/(ε' 2 +ε" 2 ) (imaginary part)], it was found that the M', and M" values showed almost zero value at low log ω. This behavior was attributed to the lack of control of mobility of charges and not having the restoring force to the charges to attain their original position[2]. For further increase of frequency, M', and M" values were increased sharply.…”