Tunable dielectric properties and magneto-dielectric coupling of hematite based trap free flexible semiconductor

Tunable, reversible resistive switching behavior of PVA-zirconia nanocomposite films and validation of the trap-assisted switching mechanism by the selective application of external bias voltages

“…If 'n' = 1, it denotes the linear ohmic conduction and 'n' = 2 denotes a trap-assisted exponentially distributed spacecharge limited conduction mechanism (SCLC). 23,65,66 As is evident from Fig. 9(b), the power law follows the trap-assisted SCLC conduction process with two distinct slopes in the range of À5 V to À4 V and À4 V to À1 V. When ZO nanoparticles are added, the slope of the composite blend rises in various places in the graph and it is supported by the development of the dipolar i-PVA phase with improved V i .…”

“…22 This indicates two different zirconia (ZO) nanoparticle phases that have nearly the same growth rates at the time of synthesis. 22 [23][24][25] The inclusion of ZO nanoparticles (0.5 vol% to 4 vol%) in the PVA matrix significantly reduced the crystallite size (from 4.5 nm to 4 nm for PZ0.5 and PZ4 films, respectively) and altered the growth mechanism of the composite's film. To completely comprehend the crystal growth kinetics of blends, we examined the XRD peaks at 19.71 for all the composite films in Fig.…”

Controlled Growth of a Highly Energetic, Less Electron-Dense Tetrahedral Fe3+ Phase on the Surface of α-Fe2O3 Nanoparticles toward Enhanced Optical, Magnetic, and Supercapacitive Performance

“…As per literature reports, bulk hematite does not show photoluminescence (PL) spectra because of the local forbidden d−d transition, resonant energy transfer between Fe 3+ cations, and efficient lattice and magnetic relaxations. 62,63 However, PL spectra of the hematite nanostructure may be observable from the surface trapped states, exciton−exciton coupling, and d−d transition with particle size larger than 20 nm. 64 The quantum confinement effect results in the delocalization and quantization of the electronic state within the nanostructures, and it relaxes the forbidden rule for d−d transition with the partially allowed optical transition.…”