Perovskite Manganites Research Articles

Microwave-aided fabrication of calcium-substituted DyMnO3 nanocomposites as prospective battery-type electrode material for supercapacitors

The Multifaceted properties of nanostructured rare earth perovskite manganite oxides have attracted much attention specifically for their applications in energy storage systems. In the present work, synthesis and physiochemical properties of calcium-substituted dysprosium perovskite manganite oxide nanocomposites and their potential applications as supercapacitors are examined. The perovskite structure and morphology of the designed nanocomposites are affirmed by the different analytical tools, including XRD, SEM, and TEM analysis. The structural analysis by XRD indicates the presence of DyMnO3 perovskite phase with additional peaks of Dy2O3 phase. The percentage of Dy2O3 is gradually reduced with higher Ca substitution, from about 16% to 7%. The Halder-Wagner method indicates an increase of the microstrain and a decrease in crystallite size with the rise of Ca substitution. From Tauc’s plot derived from DRS analysis, a slight increase in the band gap with the increase in Ca substitution is observed (2.55–2.62 eV). The surface elemental compositions and the valence states of individual elements analyzed using XPS analysis evidence the presence of Dy, Ca, Mn, and O. BET adsorption study indicates an increase in pore size, surface area, and pore volume with increasing Ca substitution concentration. When employed as a supercapacitor electrode material, Calcium-blend DyMnO3 nanocompositeexhibits battery type behavior. This material shows a higher specific capacitance (capacity) of 531 Fg−1 (319.9 Cg−1) with comparatively low charge transfer resistance and better cyclic stability. We have assembled an asymmetric supercapacitor device using our prepared sample exhibiting energy density of 36.16 Wh/kg with better cyclic stability. This work provides new insights for designing future Dy2O3 based supercapacitors.

Scanning Electron Microscopy Study of Ca0.5Nd0.5MnO3 and Ca0.5Pr0.5MnO3 Crystals

Polycrystals of perovskite manganites Ca0.5Nd0.5MnO3 and Ca0.5Pr0.5MnO3 have been synthesized, their surface structure and elemental analysis have been studied using a Scanning Electron Microscope. X-ray phase analysis revealed that these compounds have an orthorhombic crystal structure with space group Pbnm. These compounds were synthesized as polycrystals in the solid phase. It was determined that Ca − 12.25%, Mn − 31.55%, Nd − 35.58%, O − 20.62% in the compound Ca0.5Nd0.5MnO3. In Ca0.5Pr0.5MnO3 compound Ca − 12.11%, Mn − 30.62%, Pr − 36.81%, O − 20.46%. From the surface structure obtained on a micron scale, it was determined that the size of the crystallites is in the range of 20-30 microns.

Magnetocaloric Effect in Half-Doped and Self-Doped Manganites: A Study to Green Refrigeration

Magnetic refrigeration has emerged as a promising and environmentally friendly technology due to its high efficiency and eco-friendly nature. It is becoming a strong competitor to traditional gas refrigeration and is often referred to as a green refrigeration technique. This technique utilizes the magnetocaloric effect (MCE) or inverse magnetocaloric effect (IMCE) to achieve a change in temperature after adiabatic demagnetization. Among various magnetocaloric materials, perovskite manganites have drawn significant attention due to their abundance and low field MCE. In this paper, a comparative study of MCE has been presented for two different types of manganites. The self-doped La0.9MnO3 shows a considerable amount of MCE (2.5 J/Kg-K) at an applied magnetic field of 10 kOe around 255 K. In contrast, Pr0.5Sr0.5Mn0.98Cr0.02O3another manganite, shows a comparably lower value of MCE (0.55 J/Kg-K) around 220 K under the same magnetic field, but it exhibits a large IMCE (1.26 J/Kg-K) around 150 K. This comparative study provides insights into the magnetocaloric properties of these manganites, which could have potential applications in green refrigeration.

Optimized electrical transport properties of La0.7Ca0.18Sr0.12MnO3 film by adjusting sintering temperature

Perovskite manganites Lax(Ca1-ySry)1-xMnO3 have conspicuous electrical transport properties used for the application of uncooled bolometers. Thus, considerable attention has paid to the researches on electrical transport properties of Lax(Ca1-ySry)1-xMnO3. Temperature coefficient of resistivity (TCR) and the corresponding peak temperature (Tk) are crucial parameters for uncooled bolometers. Optimal La0.7Ca0.18Sr0.12MnO3 (LCSMO) films with highly oriented growth were prepared on (00l) LaAlO3 substrate at different sintering temperature (Ts) using a facile sol-gel spin coating method. Based on the analysis of microstructure, ionic valence, surface morphology and electrical transport properties, LCSMO films exhibit high crystallinity and large room-temperature TCR at higher Ts. Theoretical Curie temperature and the coupling of the electron lattice weaken gradually with the increase in Ts, which is the dominant factor for the optimization of electrical transport properties. Additionally, the results suggest that the active energy and theoretical Curie temperature play a crucial role in adjusting TCR and Tk. With the increase in Ts, the former increases while the latter decreased, resulting in a high TCR value (12.10%/K) at room temperature (297.38 K). The peak TCR value of LCSMO sintered at 1673 K is about 25% higher than that of the film sintered at 1473 K. The resulting LCSMO films demonstrate great potential for application in uncooled bolometers. Further theoretical basis on the effects of Ts on electrical transport properties was provided.

Modulation of Exchange Bias in La0.35Sr0.65MnO3/La0.7Sr0.3MnO3 through Volatile Polarization of P(VDF‐TrFE) Gate Dielectric

AbstractElectric‐field regulation of magnetic properties in perovskite manganites has attracted much attention for its potential in spintronics. For antiferromagnetic perovskite manganites, fewer studies are reported due to technological difficulties in probing their magnetic properties. Here, negative exchange bias (EB) is realized in epitaxial antiferromagnetic/ferromagnetic manganite bilayers with atomically flat interfaces. The low‐voltage pulse modulation of EB is demonstrated using the field‐effect device geometry with the ferroelectric copolymer, polyvinylidene fluoride with trifluoroethylene as a dielectric gating layer, antiferromagnetic La0.35Sr0.65MnO3 (AF‐LSMO) as pinning layer, and ferromagnetic La0.7Sr0.3MnO3 (FM‐LSMO) as conduction channel. Instead of using non‐volatile polarizations to control the EB, volatile polarizations in ferroelectric field effect transistors are suggested to be capable of modulating the EB. With high‐resolution electron microscopy and spectroscopy, the non‐volatile regulation of EB is attributed to the creation/annihilation of oxygen vacancies in the AF‐LSMO layer via low‐voltage pulses. This study reveals the effect of volatile electric polarizations in ferroelectric field effect devices and highlights the potential for low‐voltage pulse control of the physical properties in antiferromagnetic perovskite oxide insulators.

Multifunctional Magnetic Oxide-MoS2 Heterostructures on Silicon.

Correlated oxides and related heterostructures are intriguing for developing future multifunctional devices by exploiting their exotic properties, but their integration with other materials, especially on Si-based platforms, is challenging. Here, van der Waals heterostructures of La0.7 Sr0.3 MnO3 (LSMO) , a correlated manganite perovskite, and MoS2 are demonstrated on Si substrates with multiple functions. To overcome the problems due to the incompatible growth process, technologies involving freestanding LSMO membranes and van der Waals force-mediated transfer are used to fabricate the LSMO-MoS2 heterostructures. The LSMO-MoS2 heterostructures exhibit a gate-tunable rectifying behavior, based on which metal-semiconductor field-effect transistors (MESFETs) with on-off ratios of over 104 can be achieved. The LSMO-MoS2 heterostructures can function as photodiodes displaying considerable open-circuit voltages and photocurrents. In addition, the colossal magnetoresistance of LSMO endows the LSMO-MoS2 heterostructures with an electrically tunable magnetoresponse at room temperature. This work not only proves the applicability of the LSMO-MoS2 heterostructure devices on Si-based platform but also demonstrates a paradigm to create multifunctional heterostructures from materials with disparate properties.

Effect of TiO2 addition on the structural and electrical properties of La0.67Ca0.33MnO3

Numerous studies have been conducted on perovskite manganites to enhance the low field magnetoresistance (LFMR). One effective approach is adding an insulating oxide as the artificial boundary layer outside the manganite grain. This research aims to determine the structural and electrical properties of La0.67Ca0.33MnO3 (LCMO) when added with different contents of TiO2. LCMO powder was prepared via sol–gel route before appended with TiO2 nanoparticle to form (1 − x) LCMO: x TiO2, x = 0.00, 0.005, 0.010, 0.030 and 0.050. The structural analysis by X-ray diffraction (XRD) revealed no significant changes in the lattice parameter, crystallite size, bond length and angle as the concentration of TiO2 increased. The TiO2 in LCMO caused an increase in resistivity and a decrease in metal–insulator transition (TMI). This indicates the double exchange (DE) has been suppressed by the TiO2 addition, which acts as disordered layers at LCMO grains surface. The electrical resistivity of the samples was fitted with theoretical models, and the conduction mechanism is explained by the grain/domain boundary effect and the small polaron hopping (SPH) model. The first fitting inferred that the grain/ domain boundary effect plays an inevitable role throughout the conduction in the metallic region. The latter supports the notion that the presence of TiO2 in the LCMO compound produces a more resistive grain boundary.

Effects of Ca substitution on magnetic and magnetocaloric properties in PrBa1-xCaxMn2O6 system

In this study, we have examined the effect of Ba substitution by Ca on the magnetic, and magnetocaloric properties of PrBa1-xCaxMn2O6 (x = 0, 0.2 and 0.3) double perovskite manganites produced using sol-gel method. The samples were indexed in orthorhombic structure (with space group of Pbnm). The temperature-dependent magnetization, M(T), measurements indicate that all samples have a magnetic phase transition from ferromagnetic (FM) to paramagnetic (PM) state with increasing temperature. Curie temperature (TC) decreases with increasing Ca content in the main lattice. From the magnetic field dependence of magnetization measurements, M(H), maximum magnetic entropy change (−ΔSMmax) values were calculated as 4.07, 4.12, and 5.04 Jkg−1K−1 under 5 T for PrBaCaMn2O6, PrBa0.8Ca0·2Mn2O6, and PrBa0.7Ca0·3Mn2O6 samples, respectively. Relative cooling power (RCP) values below 5 T were determined as 214.16, 227.14 and 279.62 Jkg-1 based on the increasing Ca content. The −ΔSMmax and RCP values enhance with increasing Ca content, respectively. The nature of the phase transition, checked by Banerjee criterion and Franco's universal master curves, was found to be second order magnetic phase transition (SOMT).

Dielectric properties and conduction mechanism of La0.7Sr0.25Na0.05Mn0.95Al0.05O3 perovskite manganite

The present paper reports on the effects of Aluminum-doping on the micro-structural and dielectric properties of La0.7Sr0.25Na0.05Mn0.95Al0.05O3 ceramics. The analyses of the X-ray diffraction data by the Rietveld refinement technique confirmed the formation of a rhombohedral phase in the R 3 ¯ c space group. The dielectric properties were analyzed by the complex impedance spectroscopic techniques in a wide temperature extent and a spectral range between 2 kHz and 1 MHz. The Nyquist diagram with a single semicircular arc is explained by the contribution of two conducting phases associated with the effects of grains and grain boundaries. The conductivity spectrum obeyed Jonscher’s power law and the conduction mechanism was attributed to the correlated barrier hopping mechanism. The dielectric parameters such as the dielectric constant (ε″) showed a compositional dependence, indicating the prevalence of inter-grain conductive contribution and microstructural features which can be interpreted by the Maxwell–Wagner process.

Enhancement of Bi-based niobate pyrochlores conductivity with Ru-doping. Structural, optical, and electrical properties

New Ru-doped bismuth-based pyrochlores were synthesized. The effects of Ru-doping in Bi1.5Mg0.375Cu0.375Nb1.5-xRuxO7-δ on the formation of the crystal structure, stability, optical, and electrical properties of the compositions were studied. For compositions up to x = 0.1, only a phase of the pyrochlore type was detected by X-ray diffraction method (XRD) and energy dispersive X-ray analysis (EDX). Small impurities of Bi2Ru2O7, RuO2 and CuO were found for samples with x ≥ 0.25. The lattice parameters of pyrochlores decrease upon doping with Ru. X-ray diffraction modeling revealed the structural stability of the doped compositions and the distribution of Ru4+ cations in the B sites of the A2B2O6O' pyrochlore structure. A decrease in the band gap energy Eg was observed upon doping with Ru: 2.40 (x = 0) – 2.10 eV (x = 0.5) for the direct transition and 1.52 (x = 0) – 0.16 eV (x = 0.5) for indirect transition as a result of optical spectra analysis and DFT-HSE03 calculation. The chemical compatibility of the obtained pyrochlores with the manganite perovskite La0.7Sr0.3MnO3 was studied. The pyrochlores can be considered as a component of cathode composite material for using in intermediate temperature solid oxide fuel cells (IT-SOFC).

Mild nitridation of perovskite manganite: Synthesis, structure and magnetism

The nitrogen lightly doped perovskite manganite La0.5Ba0.5MnO(3-δ)-xNx was synthesized following a mild nitridation strategy by optimizing annealing temperature, annealing time and NH3/Ar flow rate ratio. Neutron powder diffraction (NPD) characterization evidences an N-doping triggered structural phase transition from pseudo-cubic Pm-3m to tetragonal P4/mmm and further confirms a preferable substitution at O1 and O2 sites closing to the Ba-rich layers. N 1s K-edge X-ray absorption near edge spectrum (XANES) with total fluorescence yield (TFY) mode, X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared (FT-IR) spectroscopy collectively convince the Mn–N bonded state. The O/N atomic ratio is determined to be 2.26/0.22 by XPS analysis closing to the value of 2.25/0.18 from NPD refinement. Magnetic property characterization reveals that both long-range Mn3+-O-Mn4+ ferromagnetic coupling and high Curie temperature (TC) are maintained upon N-doping. Besides, significant spin frozen with robust domain pinning is identified below TC which can be ascribed to the short-range Mn–N–Mn clusters and/or oxygen defects. This work expands the connotation of transition-metal based perovskite oxynitride and may inspire the development of photosensitive semiconductor device with magnetic response.

Role of Ca2+ doping on the structure, magnetic, and magnetocaloric properties of La0.75Gd0.05Sr0.2−xCaxMnO3 (x = 0, 0.05, 0.075, and 0.10) perovskite manganites

Role of Ca2+ doping on the structure, magnetic, and magnetocaloric properties of La0.75Gd0.05Sr0.2−xCaxMnO3 (x = 0, 0.05, 0.075, and 0.10) perovskite manganites

Magnetic Field Controllable Photocurrent Properties in BiFe0.9Ni0.1O3/La0.7Sr0.3MnO3 Laminate Thin Film

This paper reports a multifunctional magnetic‐photoelectric laminate device based on the integration of spintronic material (La0.7Sr0.3MnO3) and multiferroic (Ni‐doped BiFeO3), in which the repeatable modulation effect on the photoelectric properties were achieved by applying external magnetic fields. More obviously, photocurrent density (J) of the laminate was largely enhanced, the change rate of J up to 287.6% is obtained. This sensing function effect should be attributed to the low‐field magnetoresistance effect in perovskite manganite and the scattering of spin photoelectron in multiferroic material. The laminate perfectly combines the functions of sensor and controller, which can not only reflect the intensity of environmental magnetic field, but also modulate the photoelectric conversion performance. This work provides an alternative and facile way to realize multi‐degree‐of‐freedom control for photoelectric conversion performances and lastly miniaturize multifunction device.

When copper is not enough: Advantages and drawbacks of using copper in de-NOx reactions over lanthanum manganite perovskite structures

Using a Cu-doped lanthanum manganite perovskite structure (LaCu0.5Mn0.5O3-δ), we show how Pd addition following different synthesis approaches (sol-gel vs. impregnation) allows to overcome the oxidation limitation of Cu in realistic de-NOx reaction mixtures involving NO, CO, O2 and water. The beneficial interplay of Cu with the oxygen-deficient perovskite resulting from in situ exsolution during humid de-NOx treatments is strongly connected with the metallic Cu state enhancing the N2O chemistry. The beneficial catalytic properties of metallic Cu can be preserved by adjustment of the Pd amount, as evidenced by combined in situ X-ray photoelectron spectroscopy and catalytic experiments following the main reactions of the de-NOx reaction network, including water-gas shift reaction and CO oxidation. The concept of impregnation with a noble metal and simultaneous exsolution with Cu yields a reactive Cu(Pd)/perovskite interface and provides a first step towards the economization of the noble metal content at the surface in future works.

Uncovering the path to low-field colossal magnetoresistance: A microscopic view of field driven percolative insulator-to-metal transition in manganites

For perovskite manganites, their colossal magnetoresistance (CMR) requires a large field, which limits their potential applications. In order to uncover the path to achieve low-field CMR, it is crucial to understand the microscopic process of the field driven insulator-to-metal transition (IMT) in manganites. This is particularly true considering the fact that the IMT is of a percolative type, in which the interplay between nucleation and growth of the electronic phase separation domains under magnetic field is not well investigated. In this work, we investigate the magnetic field driven percolative IMT in a model system of La1−x−yPrxCayMnO3 in real space via magnetic force microscopy (MFM). Our experimental observations show unambiguously three stages of the IMT phase transition where domain nucleation and domain growth exhibit distinctly different features in the global initial magnetization measurements. Moreover, MFM reveals that domain growth requires a much lower field than domain nucleation, which provides critical information on how to achieve low-field CMR. It is believed that the exchange field provided by ferromagnetic metallic domains at the boundary with antiferromagnetic insulating domains plays a critical role in assisting the domain growth process. Optimizing such internal exchange fields in manganites is a potential route to achieve CMR without the need of a large external field.

An investigation on strain and magnetic properties of perovskite manganite superlattice films

The mixed-valence perovskite manganites attracted much attention because of their interesting electro-magnetic properties, and strain modulation on magnetic properties of perovskite manganites is worth exploring. In this paper, [La[Formula: see text]Ca[Formula: see text]MnO3/La[Formula: see text]Ca[Formula: see text]MnO3][Formula: see text] superlattice films with different La[Formula: see text]Ca[Formula: see text]MnO3 layer thicknesses are prepared by pulsed laser deposition (PLD). The crystal structures (lattice constants) of samples are measured by X-ray diffraction (XRD). The strain of the films is determined according to their crystal structures. The magnetic hysteresis loops (M-H loops) and magnetization versus temperature (M-T) curves of these superlattice films are measured by the physical property measurement system (PPMS). From the M-H loops, the coercive field (H[Formula: see text] of the samples can be measured. From the M-T curves, the Curie temperature (T[Formula: see text] of the samples can be obtained. All samples show a ferromagnetic to paramagnetic transition at TC, and the [La[Formula: see text]Ca[Formula: see text]MnO3/La[Formula: see text]Ca[Formula: see text]MnO3][Formula: see text] sample with the La[Formula: see text]Ca[Formula: see text]MnO3 layer thicknesses of 72[Formula: see text]Å has an antiferromagnetic Néel transition at TN. According to the strain state and magnetic phases, the magnetic properties are comprehensively analyzed. It is found that with the increase of ferromagnetic La[Formula: see text]Ca[Formula: see text]MnO3 layer thickness, the ferromagnetic phase is increased, and the double exchange effect can also be enhanced, resulting in the increase of TC. When the thickness of La[Formula: see text]Ca[Formula: see text]MnO3 reaches 96[Formula: see text]Å, the uneven strain distribution in the superlattice can induce the reduction of ferromagnetic phase compared with antiferromagnetic phase (even antiferromagnetic phase starts to appear), and the double exchange effect can be weakened, and finally leading to the decrease of TC. In addition, with increasing the La[Formula: see text]Ca[Formula: see text]MnO3 layer thickness, HC gradually decreases. The change of HC is related to strain states and magnetic phase interactions in the samples. The analysis of the strain and magnetism can contribute to the understanding of perovskite manganite superlattice films.

Potential of AMnO3 (A=Ca, Sr, Ba, La) as Active Layer in Inorganic Perovskite Solar Cells.

Inorganic perovskite CaMnO was proposed as a substitution for the TiO anatase in electron transport layers of solar cells containing the hybrid perovskite CH NH PbI based on increased mobility of electrons and better optical matching. Due to a suitable band gap concerning the absorption of sunlight, we investigate the potential of CaMnO and similar manganite perovskites, where Ca is replaced by either Sr, Ba or La, as an absorber layer in inorganic perovskite solar cells. In this study, we have used optical measurements on the synthesized AMnO (A=Ca, Sr, Ba, La) samples to aid density functional theory calculations (DFT) in order to accurately simulate the electronic and optical properties of AMnO compounds and gauge their potential for the role of absorber layer. Both experimental measurements and theoretical calculations show suitable band gap of 1.1-1.5 eV, depending on the compound, and absorption coefficients of the order of cm in the visible part of the spectrum.

Structural, magnetic, magnetocaloric and critical studies of Sm-substituted La0.67-xSmxPb0.13Ca0.2MnO3 perovskite manganites

The structural, magnetic, magnetocaloric, and critical behaviors for Sm substituted La0.67-xSmxPb0.13Ca0.2MnO3 manganites with x = 0, 0.1, and 0.2 were investigated in this work. Based on Rietveld refinement of XRD patterns, all samples have an orthorhombic structure with the Pnma space group. With Sm substitution, the average ionic radii of A-site cation (<rA>), the unit cell volume (V), the Goldschmidt tolerance factor (tG), and the average <θMn-O-Mn> bond angle decrease. Whereas the average bond distance, <dMn-O>, and the variance disorder parameter (σ2) increase. Ferromagnetic (FM) to paramagnetic (PM) phase transitions with second-order type were revealed for all samples from magnetization measurements and Arrott plots. Curie temperature (TC) decreases with Sm substitution from 298 K for x = 0–256 K for x = 0.2. Large maximum entropy change and relative cooling power (6.20 J Kg−1 K−1 and 236 J Kg−1, respectively) have been observed for the undoped sample (x = 0), but the values of these parameters are suppressed due to the disorder caused by Sm doping. The estimated critical exponents (β, γ, and δ) for the x = 0 sample are consistent with tricritical mean-field theory. However, for x = 0.1 and 0.2, they are close to the 3D- Ising model. The change in this universality class can be associated with the increase of disorder by substituting the Sm3+ cations in La0.67-xSmxPb0.13Ca0.2MnO3 manganites.

Structural and Morphology Changes in PrMnO3 Manganite Induced by Ba (x=0.33) Doping

In this paper, we discuss the structural and morphology properties of the solid-state prepared Pr0.67Ba0.33MnO3 perovskite manganite X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive X-ray (EDX) analyses were utilised to examine the structure, morphology, and chemical composition. The compound exhibits a single phase with an orthorhombic perovskite structure with a Pnma space group without any impurities. The refined cell parameters are a = 5.504 Å, b = 7.778 Å, and c = 5.528 Å (α = β = γ = 90° and a ≠ b ≠ c), therefore the cell volume is 236.723 Å^3. The tolerance factor is used to predict the stability of the Pr0.67Ba0.33MnO3, which is τ = 0.9241. Fourier transform infrared spectroscopy (FTIR) reveals that the Mn-O bonds appear at 600 cm^(-1). In addition, morphology SEM revealed that the grain sizes are heterogeneous, and the grain shapes are irregular. Using EDX technique, the percentage elemental composition of Pr, Ba, Mn, and O was determined. The values of the atomic percentages for each element are almost identical to the ratios of the elements during sample preparation.

Structural and magnetic properties of Ti-substituted La0.6Ba0.4Mn1-xTixO3-δ (0.02 ≤ x ≤ 0.08) perovskite manganites: Appearance of the Griffiths phase

We have investigated the effects of Ti-doping at the Mn-site of La0.6Ba0.4Mn1–xTixO3–δ (0.02 ≤ x ≤ 0.08) manganites produced via an auto-combustion technique on the structural and magnetic behavior. All of the compositions crystallize into a cubic structure with Pm3‾m space group as confirmed using Rietveld analysis of the X-ray diffraction data. Unit cell lattice parameter ‘a’ and volume ‘V’ increase upon increasing the doping concentration, which revealed that the larger Ti-ions substitute the smaller Mn-ions in the lattice. Temperature-dependent magnetization measurements revealed that all of the compositions undergo a paramagnetic to ferromagnetic transition at the Curie-temperature (TC). The TC decreases non-linearly from 309 to 212 K as the concentration of Ti-ions increases from x = 0.02 to 0.08. An abnormal behavior in the experimental effective paramagnetic moment was observed in La0.6Ba0.4Mn1–xTixO3–δ (0.02 ≤ x ≤ 0.08), which increases with the substitution of magnetic Mn-ions by Ti-ions. The experimental paramagnetic moment increases non-linearly from 6.10 to 6.52 μB. The downturn deviation in the inverse susceptibility from Curie–Weiss law for the sample with x = 0.08 revealed the appearance of a Griffiths phase. The singularity of the dc inverse susceptibility in the Griffiths phase region provided the numerical values of the Griffiths temperature (TG), critical temperature for random ferromagnet (TCR), and critical exponent (λGP) to be 310 K, 247.7 K, and 0.95(1), respectively. In the low temperature region, the larger value of the experimental saturation moment compared to the corresponding theoretical values observed for the La0.6Ba0.4Mn1–xTixO3–δ manganites indicates the possibility of spin-orbit coupling.