Novel synthetic approach to the preparation of single-phase BixLa1−xMnO3+δ solid solutions

Abstract

In this study, the Bi x La 1−x MnO 3+δ solid solutions (x from 0 to 0.65) were synthesized using sol-gel combustion method with citric acid as a fuel and complexing agent. It was shown that changes in chemical composition of the materials lead to the evolution of crystal structure, morphology, and magnetic properties. The thermal behavior of precursor gel was investigated by thermogravimetric and differential scanning calorimetry (TG-DSC) measurements. X-ray diffraction (XRD) analysis demonstrated that all samples were monophasic. The Rietveld analysis showed that the structure can be indexed by trigonal or cubic unit cell depending on Bi 3+ content. Scanning electron microscopy (SEM) was used to evaluate morphological features of the synthesized materials and revealed that Bi 3+ ions significantly promote growth of the grains. The sol-gel-derived Bi x La 1−x MnO 3+δ specimens were also characterized by FT-IR spectroscopy and magnetization measurements, which showed a clear correlation between magnetic properties and crystal structure of the materials.

Structural, magnetic, and dielectric properties of solution combustion synthesized LaFeO3, LaFe0.9Mn0.1O3, and LaMnO3 perovskites

“…33 The value is lower than the values of 0.57, 1.1, and 2.11 emu g À1 at 70, 90, and 20 kOe observed by Selvadurai and coauthors, 52 Kumar and coworkers, 59 and Azab et al, 60 respectively, prepared using solgel and coprecipitation methods. A higher M m value in LaFe 0.9 Mn 0.1 O 3 compared to the parent LaFeO 3 is also observed in a study by Wei et al 24 The paramagnetic behavior of LaMnO 3 prepared by sol-gel and coprecipitation methods has been observed in the research works of Karoblis 61 and Tiwari and Rath. 62 A comparison of the M m and H c values of LaFeO 3 , LaFe 0.9 Mn 0.1 O 3 , and LaMnO 3 prepared by various methods and different fuels via an SCS route is listed in Table 7.…”

“…62 A comparison of the M m and H c values of LaFeO 3 , LaFe 0.9 Mn 0.1 O 3 , and LaMnO 3 prepared by various methods and different fuels via an SCS route is listed in Table 7. 17,18,20,22,24,25,33,52,[59][60][61][62][63][64][65][66][67][68] It is clear from the table that the magnetic properties of LaFeO 3 , LaFe 0.9 Mn 0.1 O 3 , and LaMnO 3 vary in a broad range with respect to the various parameters such as preparation method, crystallite size, and characteristics of the fuel for the SCS method.…”

Lanthanum and Manganese Co-Doping Effects on Structural, Morphological, and Magnetic Properties of Sol-Gel Derived BiFeO3

“…For this Bi 0.1 La 0.9 Fe 0.85 Mn 0.15 O 3 compound, nearly 92% of particles are in the 40-240 nm range. Interestingly, it was shown that an increase in Bi 3+ content in Bi x La 1-x MnO 3+δ solid solutions could lead to drastic particle growth [46]. On the other hand, our previous study revealed that Mn 3+ could act as a particle growth inhibitor, limiting the grain size [22].…”

The Synthesis and Characterization of Sol-Gel-Derived SrTiO3-BiMnO3 Solid Solutions

“…Furthermore, solid solutions containing both STO and multiferroic perovskite, such as BiFeO 3 [31], can be prepared. On the other hand, BMO can be partially stabilized in a solid solution form with PbTiO 3 [32] or LaMnO 3 [33]. To the best of our knowledge, there are no studies reporting on the application of the sol-gel synthesis of STO-BMO solid solutions.…”