Large Polaron Tunneling Research Articles

Role of oxygen partial pressure of synthesis environment in tuning the dielectric properties of Nd2CuTiO6

Dielectric studies were carried out on Nd2CuTiO6 samples prepared by high temperature solid-state reaction followed by annealing under different oxygen partial pressures. X-ray diffraction studies revealed that the orthorhombic (Pnma) structure of Nd2CuTiO6 is retained in all the samples. The room temperature permittivity at 100Hz was found to be about 200 in the air-annealed sample, and it increased considerably to about 3000 upon annealing in argon atmosphere. The electrical conductivity in the argon-annealed compound was found to be an order of magnitude higher than that for the air-annealed sample. On annealing in oxygen, both permittivity and electrical conductivity of the sample were found to be significantly reduced. The variation in dielectric properties could be attributed to the induction or annihilation of mixed valence state of copper and oxygen vacancies, which was supported by X-ray photoelectron and diffuse reflectance spectroscopy data. The analysis of temperature and frequency dependent conductivity and dielectric data showed that the overlapping large polaron tunnelling (OLPT) mechanism is responsible for the observed dielectric relaxations and conduction. The observed systematic dependence of properties on the oxygen partial pressure of the annealing environment suggests a simple method to tune the electrical properties of Nd2CuTiO6.

Low temperature electrical conduction mechanisms in disordered materials with an application to Calcium Strontium Copper Titanate ceramics

Hopping conduction mechanism is studied in Strontium doped Calcium Copper Titanate (CSCTO) ceramics at low temperatures down to 93 K. The method of analyzing the local activation energy is used to identify the variable range hopping (VRH) nature in these ceramics. The frequency dependence of the corresponding localization length of mobile charge carriers is discussed. The electrical conductivity analysis in frequency up to 1 MHz suggests the predominance of the overlapping large polaron tunneling (OLPT) mechanism. The data are analyzed in light of existing theoretical models of VRH and OLPT.

Overlapping large polaron tunnelling (OLPT) type conduction mechanism in magnesium ferrite (MgFe2O4) ceramics

Overlapping large polaron tunnelling (OLPT) type conduction mechanism in magnesium ferrite (MgFe2O4) ceramics

Impedance spectroscopic study of charge transport and relaxation mechanism in the lead-free hybrid perovskite CH3NH3CuCl3

In the field of commercialization, organic–inorganic hybrid perovskite materials are becoming more popular these days in view of their prospective use in solar cells and also in other optoelectronic applications. In this paper, a non-toxic CH3NH3CuCl3 (MACuCl3) hybrid perovskite is successfully synthesized via the slow evaporation solution growth technique. The monoclinic phase of the material is checked using the X-ray diffraction measurement. The chemical composition of the prepared compound is discussed by a scanning transmission electron microscope coupled with the energy dispersive X-ray spectroscopy (STEM-EDS). Such systematic characterizations as differential scanning calorimetry (DSC) measurements and dielectric measurements indicate that MACuCl3 goes through a reversible phase transition at T1 ≈ 350/352 K MACuCl3 demonstrates a semiconducting property with a direct band gap value of approximately 2.54 eV. Over the 10−1-106 Hz frequency range, the dielectric constant, the loss factor, the electric modulus and also the electrical conductivity of MACuCl3 show strong temperature dependence. The Nyquist plot confirms the various contributions of grains and grain boundaries to the total impedance. In the high-frequency region, the dielectric constant tends to increase with temperature. The modified Cole–Cole plot asserts that while the relaxation time decreases with the rise in temperature, the space charge and free charge conductivity increase the moment the temperature climbs. In accordance with the modified Kohlrausch-Williams-Watts (KWW) equation, an asymmetrical nature corresponding to the non-Debye type of the perovskite is noticed in the electric modulus spectra at different temperatures. Moreover, the imaginary part of the electric modulus spectra is found to shift from the non-Debye toward the Debye type with the increase in temperature despite not getting the exact Debye response and emerging as a semi-conductor material. The study of the charge transfer mechanism of MACuCl3 is carried out based on Elliott's theory. The conduction mechanism in MACuCl3 is interpreted through the following two approaches: the overlapping large polaron tunneling (OLPT) model (phase 1) and the non-overlapping small polaron tunneling (NSPT) model (phase 2). Moreover, the high dielectric constant of MACuCl3 which is associated with a low dielectric loss makes it a possible candidate for energy harvesting devices.

Structural, optical, electric and dielectric characterization of a NaCu0.2Fe0.3Mn0.5O2 compound.

The compound NaCu0.2Fe0.3Mn0.5O2 was synthesized using a solid-state method and it crystallized in a hexagonal system with a R3̄m space group in an O3-type phase. The optical properties were measured using UV-Vis absorption spectrometry to determine the absorption coefficient α and the optical band gap Eg. The optical band gap energy of this sample is 2.45 eV, which indicates that it has semiconductor characteristics. Furthermore, the electrical and dielectric properties of the material were investigated using complex impedance spectroscopy between 10−1 Hz and 106 Hz at various temperatures (333–453 K). The permittivity results prove that there are two types of polarization, dipolar polarization and space charge polarization. The Nyquist diagrams show the contribution of the effects of the grain, grain boundary, and electrode properties. The frequency dependence of the conductivity was interpreted in terms of Jonscher's law. The DC conductivity follows both the Mott and Arrhenius laws at low and high temperature, respectively. The temperature dependence of the power law exponent(s) suggests that the overlapping large polaron tunneling (OLPT) model is the dominant transport process in this material. The optimum hopping length of the polaron (4 Å) is large compared with the interatomic spacing (2.384 Å for Na–O and 2.011 Å for Cu, Fe, Mn–O).

Investigation of optical and electrical properties of the semiconducting α-KZnPO4 compound.

We used the solid state method to synthesize the α-KZnPO4 compound. The X-ray diffraction pattern revealed that the sample represents a single hexagonal phase with a P63 space group. The chemical composition of the compound was examined by energy dispersive spectroscopy. The optical absorption measurement confirmed the semiconductor nature of the compound with a band gap around 4.52 eV. Furthermore, the electrical properties of the material were analyzed by means of the impedance spectroscopy, in a frequency range from 100 Hz to 1 MHz and a temperature range from 583 K to 673 K. The dependency of s(T) on temperature showed that the overlapping large polaron tunneling model is the mechanism responsible for AC conduction in the compound. A correlation between the crystal structure and the ionic conductivity was established and discussed. Finally, the temperature variation of M′′ peak showed a thermally activated relaxation process and a temperature-dependent stretching exponent β parameter.

The electrical behaviour of ultrafine bismuth phosphate particles under a range of temperature and frequency conditions.

Organic-molecule-stabilized ultrafine bismuth phosphate was synthesized by applying a wet chemical complexation-mediated route. Structural analysis confirmed the formation of monoclinic-phase nanoparticles made up of four-coordinated PO4 tetrahedral and eight-coordinated BiO8 polyhedral units. The dielectric, electrical conductivity, and impedance behaviour of the synthesized material was investigated under a wide range of frequency and temperature conditions. An alternating current conductivity study confirmed that the conduction process was followed by small and large polaron tunnelling mechanisms. An electric field-induced polarization study showed the formation of a hysteresis loop, generated as a result of the strong dipolar interactions through the Biδ+-Oδ--type covalent bonds.

Soft/hard ferrite nanocomposites: Evaluation of temperature dependent dielectric properties

Nanocomposites of cobalt ferrite (CoFe2O4) and strontium ferrite (SrFe12O19) were synthesized with various weight ratios 1:1, 1:2, 1:4, 1:8 and 1:16, by chemical co-precipitation route with higher content corresponding to SrFe12O19. Dual phase refinement employed for the prepared composites and confirms the presence of independent CoFe2O4 and SrFe12O19 phases. The increasing weight fraction of SrFe12O19 in the prepared composites is in accordance with its increasing weight ratio. An increase in compressive strain in the composites was attributed to larger ionic radius of Sr+2 ions. The electrical behavior in the composites was described by Cole-Cole plots at 250 °C from 20 Hz-106 Hz. An increase in impedance with increasing weight ratio of SrFe12O19 was observed, due to creation of effective scattering centers. Conductivity mechanism was explained by Overlapping large polaron tunneling (OLPT) model. A decrease in dielectric constant with increasing frequency is due to decreasing space charge polarization, due to inability of charge carriers to follow the varying ac field. Decreasing trend in dielectric loss for the prepared composites confirms their utility in microwave absorption applications.

Structural and tunable dielectric properties of cobalt ferrite-based nanocomposites

Nanocomposites C:S-1:4 comprising cobalt ferrite (CoFe2O4), strontium ferrite (SrFe12O19) and C:B-1:4 containing cobalt ferrite (CoFe2O4), barium ferrite (BaFe12O19) were synthesized in weight ratios of 1:4 by chemical co-precipitation route with higher content corresponding to SrFe12O19 and BaFe12O19. Rietveld refinement was employed to confirm the presence of independent CoFe2O4, SrFe12O19 and BaFe12O19 phases. The average crystallite size of CoFe2O4 and SrFe12O19 in C:S-1:4 was observed as 20 nm and 56 nm which depicts an increase as compared to individual components. The observed lattice strain in C:S-1:4 was 0.05% and 0.03% for CoFe2O4 and SrFe12O19. In C:B-1:4, the value of strain was 0.06% and 0.04% for CoFe2O4 and BaFe12O19. Increased lattice strain was observed in the prepared composites. Increase in impedance for the prepared composites was observed from measurements performed in the frequency range 20 –106 Hz. Conduction mechanism was explained by overlapping large polaron tunneling model. Dielectric loss measurements for the prepared composites were observed to decrease establishing their usage in microwave applications.

Investigation of the new ammonium phosphate protonic conductor: Crystal structure, vibrational study, electric and dielectric properties

• Investigation of NPTe material has been regarded technologically significant. • Thermal analyses highlight one phase transition before the decomposition. • Electrical properties prove that this material is a typical relaxer and a super-ionic protonic conductor. • The fundamental conduction mechanism is the overlapping large‒polaron tunneling (OLPT) model. The hydrothermal preparation yielded a new super ionic-protonic conductor. The (NH 4 ) 2 HPO 4 .Te(OH) 6 (NPTe) which crystallizes in the monoclinic system P2 1 /c. its crystal structure, is built up from isolated (HPO 4 2- ), (H 6 TeO 6 ) and (NH 4 + ) groups connected by two types of hydrogen bonds: O-H…O and N-H…O, which make up the building of the crystal. IR study highlighted the presence and the independence of the ionic groups and provided detailed information on hydrogen bonds. DSC, DTA and TG, corroborate that the phase transition related to the decomposition, starts at about T= 475K, manifested through the release of water and ammoniac gas. The (NPTe) compound was characterized by complex impedance spectroscopy in the selected temperature and frequency ranges. In fact, the adjustments of the Nyquist plots were performed using an equivalent circuit consisting of two cells. However, the thermal evolution of the conductivity σ dc for this compound displays an Arrhenius – type behavior and suggests that the electrical conduction of our material is provided by a hopping mechanism. Furthermore, the frequency behavior of the conductivity σ ac suggests that the conduction of the title compound is ensured by a mechanism of overlapping large‒polaron tunneling (OLPT) model.

Overlap large polaron sensitivity to phase changes in the first alkali earth organic-inorganic hybrid: [(CH2)7(NH3)2]CaCl4

Crystal structure characterization, lattice potential energy, conductivity relaxation and electric conduction mechanisms of the new alkaline earth metal organic-inorganic hybrid, [(CH2)7(NH3)2] CaCl4 are presented. The new hybrid crystallizes in a triclinic system (S.G. P‾1) with two molecules per asymmetric unit cell (Z = 2). Crystallographic parameters are: a = 7.029 Å, b = 8.003 Å, c = 14.039 Å, α = 65.43°, β = 69.99°, γ = 61.39°, the calculated volume and density are 620.3 A3 and 1.68 Mgm−3 respectively. Room temperature lattice potential energy is ΔUpot = 1932.34 (kJ/mol.) and enthalpy change ΔH = 453.8 (kJ/mol.). DSC results indicated weak peaks at T7 = 239 ± 1 K, T6∼ 258.6 ± 0.5 K, a sharp λ-like peak typical of first order T5∼ 266.5 ± 0.5 K, a commensurate to incommensurate at T4 = 279 K, an incommensurate to unmodulated at T3 = 283 ± 1 K, and a chain melting transition is noted with minor peak at T2 = 326.5 K and major one at T1 = 329.3 K. Dielectric constant measurements in the temperature range (170–420) K and frequency range 60 Hz- 40 kHz confirmed the DSC transitions. It is characterized by a nearly temperature and frequency independent background of low dielectric constant (ε’) except at the transitions and at T ≥ 344 ± 2 K where frequency dispersion takes place. At high temperatures, calculated conductivity relaxation energy and relaxation time, are ΔE = 0.78 eV and (το) = 7.81614 × 10−14 s respectively. Fit of frequency dependent ac-conductivity to super-linear power law σtot = σdc + A1ωs1+ A2ωs2 shows different conduction mechanisms in the different temperature ranges (phases). Overlap large polaron tunneling (OLPT) of small radius dominates in the temperature range (240–290) K, it is very sensitive to the phase transitions in this temperature range where the polaron radius varies as the phase changes, which is reflected as small variations of the fitting parameters. In phase VIII (T < 239 K), phase III (295 < T(K) < 326.5) and phase II (327 < T(K) < 339); quantum mechanical tunneling (QMT) is the conduction mechanism. The lower value of the fitting parameters in phase (II) indicates stronger interaction between mobile ions with the lattice than phase (III). At higher temperatures correlated barrier (CBH) hopping prevails. Comparison to other transition metal hybrids of the same organic chain is discussed.

Influence of Magnetite Nanoparticles Shape and Spontaneous Surface Oxidation on the Electron Transport Mechanism.

The spontaneous oxidation of a magnetite surface and shape design are major aspects of synthesizing various nanostructures with unique magnetic and electrical properties, catalytic activity, and biocompatibility. In this article, the roles of different organic modifiers on the shape and formation of an oxidized layer composed of maghemite were discussed and described in the context of magnetic and electrical properties. It was confirmed that Fe3O4 nanoparticles synthesized in the presence of triphenylphosphine could be characterized by cuboidal shape, a relatively low average particle size (9.6 ± 2.0 nm), and high saturation magnetization equal to 55.2 emu/g. Furthermore, it has been confirmed that low-frequency conductivity and dielectric properties are related to surface disordering and oxidation. The electric energy storage possibility increased for nanoparticles with a disordered and oxidized surface, whereas the dielectric losses in these particles were strongly related to their size. The cuboidal magnetite nanoparticles synthesized in the presence of triphenylphosphine had an ultrahigh electrical conductivity (1.02 × 10−4 S/cm at 10 Hz) in comparison to the spherical ones. At higher temperatures, the maghemite content altered the behavior of electrons. The electrical conductivity can be described by correlated barrier hopping or overlapping large polaron tunneling. Interestingly, the activation energies of electrons transport by the surface were similar for all the analyzed nanoparticles in low- and high-temperature ranges.

Synthesis, identification and application of metal organic framework for removal of industrial cationic dyes

• Adsorption properties of ZIF-7. • Adsorption fit with pseudo second order kinetics and Langmuir isotherm model. • Adsorption of methylene blue (MB) and brilliant green (BG). • The BET surface area was 94.19 m 2 /g and pore size 2.79 nm. One form of metal organic frameworks (MOFs) that has been zeolitic imidazolate framework-7 (ZIF-7) is synthesized and characterized and detailed analysis adsorption behavior with Methylene Blue (MB) and Brilliant Green (BG) dyes. Impact of various variables on the method of batch as a solution pH function, MB and BG concentration, ZIF-7 dose, contact time and BG concentration, contact time and the temperature was analyzed and optimal test conditions were identified. Electron microscopy (SEM) has become a common tool for morphology characterization of materials such as ZIF-7. The pores in the substance ZIF-7 have a BET surface area of 94.19 m 2 g − 1 and an average pore size of 2.79 nm, indicating that they are mesoporous. The average pore size of BJH is 1.4477 nm, which is ideal for adsorption. The zero charge (pH PZC ) point of ZIF-7 was computed at 7.5. The adsorption kinetics showed that the action in the pseudo-second processes was adopted by adsorption: order kinetic model and chemisorbing. The parameters of thermodynamics, such as ΔG, ΔS and ΔH, have been specified. The study of adsorption thermodynamics indicated that the reaction was spontaneous and endothermal. The AC electrical conductivity was investigated, with the overlapping large-polaron tunneling (OLPT) model as the operative conduction mechanism.

Electrical and dielectric properties of Sm0.55Sr0.45MnO3 compound

In the present study, Sm0.55Sr0.45MnO3 manganite was elaborated using the conventional solid-state reaction method. Electrical and dielectric measurements carried out using impedance spectroscopy technique. The direct current study shows that the compound exhibits semiconductor behavior. Then, a saturation in the DC conductance is observed at around 360 ​K. Conductance spectra are discussed in the outline of single and double Jonscher power laws. In the intermediate frequency range, the AC conductance is governed by the activation of a correlated barrier hopping (CBH) conduction mechanism. Hence, the overlapping large polaron tunneling (OLPT) process dominates the transport properties at high frequencies. Finally, the dielectric response confirms the contribution of the grain, grain boundary, and the electrode polarization on the dielectric properties of the Sm0.55Sr0.45MnO3 compound.

Investigation of optical and electrical conduction mechanism of AgYP2O7 prepared by solid state process

Diphosphate materials are promising materials for different applications where their properties need to be widely studied in order to optimize them. The AgYP2O7 compound was prepared following the solid-state reaction method. X-ray powder reveals that the title compound crystallizes in the triclinic system, while differential scanning calorimetry analysis discloses the existence of an endothermic peak around T = 480±10 K indicating the existence of a phase transition. As for optical properties, using reflectance spectroscopy and Kubelka– Munk's procedure, the deduced value of the direct energy gap of Eg =2.29±0.09 eV. The variation in conductivity with temperature confirms the presence of the phase transition evidenced by DSC measurements. The AC conductivity data are well described by Jonsher's law. The thermal behavior of the exponent parameter "s" reveals that the conduction mechanism changes from over large polaron tunneling to non-overlapping small polaron tunneling at the temperature of phase transition.

The lithium-ion battery: Study of alternative current conduction mechanisms on the Li3PO4 - based solid electrolyte

Lithium-ion batteries have been dominating as a power source in digital cameras, laptop computers, mobile phones and electric/hybrid electric vehicles. This can be explained by their high life cycle and power density which differentiate them from other battery types. Lithium phosphate is considered among the favored solid electrolyte materials for the lithium-ion battery because of its high ionic conductivity. In this study, Lithium phosphate (Li3PO4) compound was obtained by the classic ceramic method. The X-ray powder diffraction pattern indicates that at room temperature, Li3PO4 crystallized in the orthorhombic system with Pnma space group. The morphology and composition of Li3PO4 were performed by scanning transmission electron microscope coupled with energy dispersive X-ray spectroscopy (STEM-EDS). Infrared spectroscopy was confirmed the presence of (PO4)3− anion and its vibrations. The measurements of the electrical properties were performed in the 100 Hz to 1 MHz frequency range and 528–713 K temperature intervals. The interpretation of Nyquist curves revealed the presence of three electrically active areas equivalent to the electrode processes, distribution of grain boundaries and bulk mechanism. The alternative current electrical conduction in Li3PO4 was interpreted through several processes, which can be associated to two different models: the non-overlapping small polaron tunneling (NSPT) model in the region I and the overlapping large polaron tunneling (OLPT) model in the region II. Elliot's theory was used to interpret the conduction mechanism, and all Elliot's parameters were determined.

Investigation of crystal structure, dielectric properties, impedance spectroscopy and magnetic properties of (1-x)BaTiO3 – (x)Ba0.9Ca0.1 Fe12O19 multiferroic composites

Composites having composition (1-x)BaTiO3−(x)Ba0.9Ca0.1Fe12O19 (x = 0.10, 0.20, 0.30) were synthesized by conventional solid-state reaction technique. X-ray diffraction (XRD) was used to examine the phase formation. Rietveld refinement has been done using the FullProf suite which predicted the dual phase symmetry consisting hexagonal (P63/mmc) and tetragonal (P4mm) phases in the prepared composites. The dielectric properties of the obtained composites were investigated at different temperatures as a function of frequency in the range of 100 Hz to 7 MHz. The dielectric constant increases with an increase in Ca doped barium ferrite content. The composites showed usual dielectric dispersive behaviour with increasing frequency. The conduction mechanism and dielectric relaxation were examined by complex impedance spectroscopy (CIS). Nyquist plots of all composites showed two semicircles and their centers lied below the real axis. Magnetic characterization was performed by using a vibrating sample magnetometer (VSM) up to a field of 15 kOe at room temperature. The hysteresis loops reveal the ferromagnetic nature of the composites. The values of saturation magnetization, magnetic moment per formula unit, and corresponding coercivity increases with ferrite content and are maximum at x = 0.3. AC conductivity also increases with ferrite content. The variation of frequency exponent ‘n' of the power-law with temperature suggests that the overlapping large polaron tunneling (OLPT) model is appropriate to explain the mode of conduction in all samples.

Characterization of the structure and conduction behavior of overlapping polaron tunnel of dipotassium zinc orthogermanate

In this work, we are focused to study the structural, vibrational and electrical properties of K2ZnGeO4 ceramic compound. The KZGO was prepared by conventional solid-state method. X-ray diffraction (XRD) analysis reveals that the sample is well crystallized in the orthorhombic structure with Pca21 space group. Moreover, IR spectrum for this compound confirm the presence of group functionally [GeO4]4-. The electrical measurements was studied in the 40 Hz–1 MHz frequency interval and 533–653 K temperature range. AC conductivity of K2ZnGeO4 is showed on the basis of the overlapping large polaron tunneling (OLPT) model. The activation energy calculated from both the DC conductivity and modulus spectra are close quite to notify that the electrical conductivity and the relaxation process are attributed to the same effect. Thermodynamic parameters for instance the enthalpy ΔH, and the change in entropy ΔS and the free energy of activation ΔF have been determined.

Study of dielectric relaxation and polaron conductivity mechanism in sodium nitroprusside (SNP): Na2[Fe(CN)5(NO)]·2H2O

In this study, the crystal structure of sodium nitroprusside, Na 2 [Fe(CN) 5 (NO)]·2H20, has been determined by an analysis by X-ray diffraction (XRD). The crystal is orthorhombic, space group Pnnm. This compound is characterized by different techniques: X-ray diffraction (XRD), differential scanning calorimetry (DSC) and impedance spectroscopy. For electrical properties, impedance spectroscopy was performed at a frequency range of 20 Hz–2 MHz. The dependence of AC conductivity on frequency was found to satisfy Jonscher's universal power law at different temperatures σ ( ω ) = σ D C ( ω , T ) + A ω S ( T , ω ) . This suggested hoping conduction due to three theoretical models. The latter can be attributed to the correlated barrier hopping (CBH) model in region I, overlapping large polaron tunneling (OLPT) in region II and non-overlapping small polaron tunneling (NSPT) mechanism in region III. The temperature dependence and dielectric relaxation of the DC conductivity satisfied the Arrhenius law. The activation energy ranged from 0.033 to 0.164 eV and was similar in the conduction and relaxation mechanisms, indicating that the transport mechanisms were based on hopping phenomena. Moreover, the modulus plots has been characterized by full width at half height or in terms of a non-experiential decay function ϕ(t) = exp(−t/τ)β. The values of the activation energies obtained from the electrical conductivity and electric modulus are near; which suggests that the transport is probably due to the ion hopping mechanisms. Furthermore, this behavior was confirmed by both Nyquist and Argand's plots of dielectric impedance at different measuring temperatures. Crystal structure, Molecular Hirshfeld surfaces, hydrogen bonding, UV absorption and phase transition of the β-NH 3 (CH 2 ) 2 NH 3 SnCl 6 compound. • This compound is crystallized in the orthorhombic system (Pnnm space group). • Differential scanning calorimetric (DSC) experiments show a phase transition at 130 K and 155 K. • The conduction mechanism is attributed to the (CBH) model, (OLPT) and (NSPT) mechanism. • The activation energies suggest that the transport is probably due to the ion hopping mechanisms. • The near value of activation energies obtained from the analysis of M.

Investigation on Multiferroic Properties and Conduction Mechanism in Cobalt Doped Bi0.9Nd0.1FeO3 Solid Solutions

Bi0.9Nd0. 1Fe1–x Co x O3 (x = 0.025, 0.050, 0.075 and 0.1) solid solutions have been synthesized by doping of Co3+ at the Fe3+ site using solid-state reaction method. The prepared solid solutions have been investigated for their structural, magnetic, ferroelectric and magneto-dielectric properties and conduction mechanism. The XRD study reveals that all the solid solutions possess a rhombohedral symmetry. The vibrating sample magnetometer study reveals that all the samples possess magnetic orders and the remnant magnetization has been found to be increased from 0.2388 emu/g for x = 0.025 to 0.7112 emu/g for x = 0.1. The non-Debye type dielectric relaxation has been investigated for all the samples. The frequency dependent ac conductivity data follows Jonscher’s Power law. Variation of exponent n versus temperature follows the overlapping large polaron tunneling conduction model. The maximum value of remanent polarization (∼0.152 μC/cm2) was found for x = 0.1. All the samples exhibit positive magneto-dielectric response in the low-frequency region with the highest magneto-capacitance value of 13.54% at 500 Hz for sample x = 0.1.