Structural, electrical, and magnetic properties of nano Sr1-XLaXFe12O19 (X = 0.2 - 0.8)

Abstract

The current work mainly focused on the synthesis, structural, electrical, and magnetic characterization of Sr1 − XLaXFe12O19 (X = 0.2–0.8) (SLFO) nanoparticles synthesized via the hydrothermal reaction technique. The hexagonal crystalline planes were determined using X-ray diffraction analysis. The obtained results indicated that the lattice constants were noted to be increasing from 0.58801 to 0.58825 nm (a = b), and 2.30309 to 2.30341 nm (c) with increase of ‘X’. The morphological studies ensured that the grains as well as nanoparticles of SLFO acquired almost spherical shape. The optical properties were investigated using FTIR and UV-Visible spectra. The optical bandgap (Eg) of SLFO was found to be increasing from 1.866–2.118 eV with dopant content. The electrical properties of SLFO were studied in detail as a function of temperature, and frequency. In addition, the dielectric modulus, and impedance spectroscopy analysis was carried out to describe the space charge polarization, and electric conduction mechanism respectively. The hysteresis loop (M-H curves) of SLFO revealed the decrease of magnetization from 36.34–7.17 emu/g with ‘X’.

Effect of Ni2+and Co2+ substitution on the characteristics of the strontium aluminum hexaferrite (SrAl2Fe10O19)

“…Due to this process, the dielectric constant value decreases at lower frequencies. At higher frequency, all samples showed constant values of dielectric constant [28,31]. Also, the dielectric constant change at various temperatures at 1MHz frequency is represented in Fig.…”

Relative Investigation on Microwave-Assisted Zr-Modified PbTiO3 and BaTiO3 Ferroelectric Ceramics for Energy Storage Application

“…This is due to weak and constant feedback of the charge carriers at this range of temperatures. 28 Beyond 250 °C, a steep rise of ϵ r is noticed. At 1 MHz, PZT has a maximum ϵ r value of 3796, which is higher than previously reported values.…”

Low‐temperature hydrothermal synthesis of NiEuFe2O4 nanoparticles: Magnetic, thermal, and magneto‐dielectric behavior

“…This in turn establishes the existence of domain wall rotations, reinforcing the production of coercivity. 42 That means domain wall displacement possesses the low contribution in achieving the H c value. The cation distribution is performed using the two-sublattice model.…”

“…The cation distribution is performed using the two-sublattice model. 42 This model says that the total n B can be calculated using the formula M = M B -M A (where individual magnetic moment values of A and B sites are measured). It is clear from the cation distribution that the ferric ion concentration is reduced from x = .02 to .08 except x = .06 at both sites.…”