The effects of Mg2+ and Ba2+ dopants on the microstructure and magnetic properties of doubly-doped LaFeO3 perovskite catalytic nanocrystals

Autocombustion‐Promoted Synthesis of Lanthanum Iron Oxide: Application as Heterogeneous Catalyst for Synthesis of Piperidines, Substituted Amines and Light‐Assisted Degradations

“…[60,61] Besides this, to get assured of the optimum calcination temperature necessary for the formation of the pure perovskite phase, the position of the diffraction peaks belonging to the calcination temperature 700°C were matched with ICSD Card no:-98-016-3226 ( Figure ES2) [62] The average crystalline size of the prepared NPs at various calcination temperatures was calculated by employing Debye-Schrrer's Equation. [63,64] where D denotes the mean size of the nanocrystallite (nm), K is the Schrrer's constant having the value 0.89, β is the width of the line at half maximum intensity (FWHM), λ is the wavelength of the X-ray used (0.1542 nm), Ɵ is the Bragg's angle (or angle of diffraction). The width of the three distinct planes such as (101), (121) and (240) were hired in order to determine the mean size and it was figured out to be that the average size was 46.23 nm, 33.06 nm, 31.41 nm, 2.01 nm, 1.62 nm and 1.08 nm at calcination temperature 700°C, 600°C, 500°C, 400°C, 300°C and that of uncalcinated sample respectively.…”

Structural, morphological, optical, magnetic and ferroelectric properties of Ba0.2La0.8Fe2O4 nanofibers

“…Moreover, some of the previous reports exorcised with this type of materials very interestingly in many areas viewing to their multi ferric nature and narrow optical band gap. Qing Lin et al [9]. Synthesized Mg, Ba dual doped La 0.85 FeO 3 particles in nanometer size via sol-gel method it was found that the particle size depends upon the preparation method, whereas they found that lowtemperature calcination is probably good for getting pure phase in XRD, on the other hand, the VSM studies show the Ba +2 can increase the H c value.…”

Synthesis and Characterizations of LaMnO3 Perovskite Powders Using Sol-Gel Method 

“…Lanthanum-based perovskite materials possess ostensible optical [1,2], magnetic [3][4][5] and catalytic properties [6]. These materials have been extensively preferred in many areas such as catalysts [7][8][9], chemical sensors [10], solid oxide fuel cell electrodes [7], hydrogen storage [11], optoelectronic devices [12], solar cells [13], magnetic materials [14,15] by virtue of stability, different oxidation states, exible oxygen stoichiometry, power conversion e ciency and isomorphic substitution of metals in their structures [10,16].…”

“…As a magnetic material, LaMnO 3 literally indicates gorgeous attributes in tandem with photovoltaic characteristics. It is an orthorhombic perovskite structure insulating antiferromagnetic material and its Neél temperature (T N ) is approximately 140 K. The magnetic manners of LaMnO 3 material are acquired from Mn 3+ (3d 4 , ) captions super-exchange interactions inasmuch as the Mn 3+ cations are located in an octahedral crystal eld with six oxygen anions as MnO 6 form. There is a strong correlation betwixt the e g and t 2g orbitals' electron spins and this triggers the Jahn-Teller distortion of MnO 6 octahedra around Mn 3+ ions.…”