Investigation of structural, optical, and magnetic properties of Nd‐doped Sr₂SnO₄ Ruddlesden Popper oxide

Abstract

The samples of Sr2‐xNdxSnO4 with x = 0, 0.01, 0.02, 0.04, 0.06, and 0.10 were synthesized by a high‐temperature solid‐state ceramic route. Rietveld refining of X‐ray diffraction results showed that all the synthesized compositions are single phase under tetragonal crystal structure. The presence of functional group and local structure has been studied using FTIR and Raman spectroscopy, respectively. XPS study of samples showed the presence of oxygen vacancy and interstitial oxygen in the sample. Optical band gap of samples analyzed by UV‐Vis spectra gradually increases with dopant concentration, and Photoluminescence (PL) spectroscopy study showed most intense emission around 1064 nm. Room‐temperature magnetic hysteresis curve in sample SSN2 showed ferromagnetism, slowly decreasing with Nd and becoming antiferromagnetic for higher compositions. Utilizing the absorption state observed in PL as metastable state makes it promising candidate for laser and IR detector application and the ferromagnetic/antiferromagnetic nature of sample makes it suitable candidate for spintronics device applications.

Structural, optical and electrical properties of Mn-doped ZnFe2O4 synthesized using sol–gel method

“…The increase in doping concentration of Mn leads to charge compensation processes partially as per equation ( 5) and ( 6), due to presence of Mn in mixed valence state (Mn 2+ /Mn 3+ ) (as described in Rietveld refinement analysis). The donor type substation acts as grain growth inhibitor [38]; that might be possible reason for decrease in the crystallite size of sample ZF-4. Moreover, gradual increase of micro-strain may be associated to the difference of ionic radii between Mn and Zn, as well as the existence of defects as shown by equation ( 5) and ( 6) (See Table 1).…”

Studies on the structure, optical, ac conduction mechanism by OLPT model and impedance spectroscopy of La-doped Ba2SnO4 Ruddlesden Popper Oxide

“…The reaction between the reactants is expected to proceed in the same manner as B2LS0; The weight loss has been calculated from equation ( 1) and (2) are almost 16.03 %. The weight loss occurred up to 100 o C in B2LS2 is assigned to the evaporation of water molecules adsorbed at the surface of particles that adsorbed during the mixing of solids [32]. Since CO2 loss is the primary cause of weight loss in both samples, and the total weight loss obtained experimentally is nearly half of what is predicted.…”

“…However, the addition of La to the sample suppressed a few of the bands (1020, 1122, 1952 cm -1 ) and moved the other bands to higher wavenumbers. The vibrations of BaO and SnO6 octahedra are assigned to the two bands present at 515 cm -1 and 616 cm -1 , respectively [32,36]. The expand view of the characteristic band has been shown in Fig.…”

Structural Changes from Conventional SrSnO3 to Ruddlesden–Popper Sr2SnO4 Perovskites and Its Implication on Photoluminescence and Optoelectronic Properties

“…B and D are characteristic Raman bands of the Sr 2 SnO 4 phase with a tetragonal structure and I 4/ mmm space group. The A and B Raman bands have been ascribed to the A 2u mode endowed, respectively, by oxygen’s rotation in equatorial and apical planes. − On the other hand, bands C and E are reported as second order Raman bands …”