Antiferromagnetic Behavior Research Articles

Insights into the Synthesis Parameters Effects on the Structural, Morphological, and Magnetic Properties of Copper Oxide Nanoparticles.

The present study aims at the integration of the "oxalic conversion" route into "green chemistry" for the synthesis of copper oxide nanoparticles (CuO-NPs) with controllable structural, morphological, and magnetic properties. Two oxalate-containing precursors (H2C2O4.2H2O and (NH4)2C2O4.H2O) and different volume ratios of a mixed water/glycerol solvent were tested. First, the copper oxalates were synthesized and then subjected to thermal decomposition in air at 400 °C to produce the CuO powders. The purity of the samples was confirmed by X-ray powder diffraction (XRPD), and the crystallite sizes were calculated using the Scherrer method. The transmission electron microscopy (TEM) images revealed oval-shaped CuO-NPs, and the scanning electron microscopy (SEM) showed that morphological features of copper oxalate precursors and their corresponding oxides were affected by the glycerol (V/V) ratio as well as the type of C2O42- starting material. The magnetic properties of CuO-NPs were determined by measuring the temperature-dependent magnetization and the hysteresis curves at 5 and 300 K. The obtained results indicate the simultaneous coexistence of dominant antiferromagnetic and weak ferromagnetic behavior.

Sol–gel combustion derived novel ternary transition metal boride-anisotropic magnetic powders and their magnetic property

We investigated the auto-ignition based sol–gel approach for the synthesis of ternary transition metal boride (TTMB) powders and studied their magnetic property. The obtained TTMB powders were found to have different crystallinity and magnetic behavior, based on the boron to metal ratio and further introduction of dysprosium into one of the sample lattice. The magnetic results obtained by vibrating sample magnetometer shows that TTMB is a soft magnet which demonstrates high ferromagnetic behavior with increased magnetic saturation based on the boron content, while the dysprosium based TTMB on contrary was found to exhibit an antiferromagnetic behavior. The TTMB powder showed no impurities as observed in Raman spectroscopy. The morphology of the powders obtained microscopically displays distinctive facets in the crystalline samples. The TTMB powders can be prospectively used in different polymer matrix to fabricate novel devices for sensors, environmental catalysts, radiation shielding and contrasting agents etc., to name a few.

Synthesis, structure and properties of five new complexes based on triazole/imidazolyl aromatic acid ligands

Five new metal complexes [Pr2(HL1)2(NO3)4(H2O)6]·H2O (1), [La2(HL1)2(NO3)4(H2O)8] (2), [Mn(HL1)2(H2O)4]·H2O (3), [Co(HL2)2(H2O)4]·H2O (4) and [Ni(HL2)2(H2O)4]·H2O (5) [H2L1=2-(4-(1H-1,2,4-triazol-1-yl)phenyl)-1H-benzo[d]imidazole-5-carboxylic acid, H2L2=2-(4-(1H-imidazol-1-yl)phenyl)-1H-benzo[d]imidazole-5-carboxylic acid] based on triazole/imidazolyl aromatic acid ligands were synthesized under solvothermal conditions. The single crystal X‑ray diffraction showed that 1 and 2 are binuclear structures, while 3, 4 and 5 are mononuclear structures. Solid-state fluorescence studies showed that the emission peaks of complexes 1 and 2 were 412 nm and 435 nm, respectively (λex=355). Complex 1 and 2 exhibits adsorption performance to Congo red (CR), the maximum adsorption capacity 1 was 136.9 mg·g − 1 and 2 was 107.8 mg·g − 1, respectively. Electrochemical performance studies showed that the capacitance of complexes 3 and 4 at 0.5 A·g − 1 were 142.94 F·g − 1 and 71.14 F·g − 1, respectively. The magnetic properties of complexes 3–5 was studied and the results showed that complex 3 had ferromagnetic behavior and complexes 4–5 had antiferromagnetic behavior.

Magneto-electric effect in Y1-xRxFeO3 (R = Sm and Er) ceramics

In the present work, we synthesize a series of Y1-xRxFeO3R=Er,Sm&0.≤x≤1 polycrystalline compound by solid-state reaction method to study the A-site substitution effects on physical properties in YFeO3. The Rietveld refinement of X-ray diffraction analysis indicates that with Er3+ substitution, the lattice parameters have decreased, and more structural distortion has been shown compared to Sm3+ substitution. The obtained magnetic hysteresis loops reveal that Er3+ ions have induced an antiferromagnetic behavior in YFeO3 because of a reduction in the Dzyloshinskii-Moriya interaction. The Y1-xSmxFeO3 family, however, shows a weak ferromagnetic behavior. Furthermore, due to the spin reorientation (SR) transition, a distinct anomaly has been detected in the temperature dependence of Ac susceptibility and dielectric constant curves. With substituting Sm at the Y-site in the YFeO3 compound, SR transition happens at a temperature, TSR, in which the spin structure changes high-temperature Γ4 to Γ2 configuration, and therefore the starting and ending of the SR region depend on Sm concentration. Interestingly, we have observed a gigantic dielectric constant in Y0.7Sm0.3FeO3, Y0.5Er0.5FeO3, and Y0.25Er0.75FeO3. It, however, has demonstrated that Y0.7Sm0.3FeO3 is the only compound that shows a relaxor ferroelectric behavior. The observed peak in the temperature dependence of the dielectric constant has also described a magnetic transition temperature indicating the magneto-dielectric effect in our studied samples.

Nanoparticles Containing Biocompatible Radicals Based on 1,2,4-Benzotriazinyl for Reactive Oxygen Species Scavenging in Living Cells

We report the first demonstration using π-conjugated radicals for reactive oxygen species (ROS) scavenging. The ester-derived 1,2,4-benzotriazinyl monoradical VER and its carboxyl counterpart VAR exhibit typical antiferromagnetic behavior with a thermally populated spin-triplet state. Upon self-assembly with DSPE-PEG1000, VER formed ∼25 nm size nanoparticles (NPs) with good water dispersibility and stability, no obvious aggregation and degradation were observed after storing at ambient environment for 14 days. In contrast, VAR NPs were unstable and visible aggregates appeared on the seventh day. These radical NPs show good biocompatibility, there was almost no decrease in the cell viability after being incubated with either NPs even at a concentration of 100 μg/mL. Importantly, excessive ROS of the studied model RAW264.7 cells was scavenged to normal concentration when incubated with VER NPs, whereas ROS of VAR NPs treated model cells was almost not changed or even increased.

Study on magnetic and dye adsorption properties of five coordination polymers based on triazole carboxylic acid ligands

Five new coordination polymers based on triazole carboxylic acid ligands, namely {[Mn2(L1)2(H2O)2]·H2O}n (1), [Ni2(L1)2(H2O)2]n (2), { [Co2(L1)2(H2O)2]·0.5H2O}n (3), [Cu(L2)2(H2O)]n (4) and [Zn(L3)(H2O)Cl]n (5) [H2L1=5-((4-(1H-1,2,4-triazol-1-yl)benzyl)amino)isophthalic acid, HL2 =4-((4-(1H-1,2,4-triazol-1-yl)benzyl)amino)benzoic acid, HL3=4-(((1H-1,2,4-triazol-3-yl)amino)methyl)benzoic acid] were hydro-/solvothermally synthesized and further characterized by Fourier transform infrared spectroscopy (FTIR), differential scanning calorimeter (DSC) and X-ray crystal diffraction. X-ray single-crystal diffraction revealed that complexes 1–3 are two-dimensional (2D) layered architectures, complex 4 and 5 are chain structures, and 5 further forms a 2D supramolecular structure through hydrogen-bonding interactions. The magnetic properties of complexes 1–4 were studied and the results showed that complexes 1–4 have antiferromagnetic behavior. In addition, complex 5 exhibits adsorption performance to Congo red (CR), the maximum adsorption capacity is 263.2 mg·g−1, and the adsorption isotherm, adsorption kinetics, effect of pH and cycling performance were investigated in detail.

Влияние параметров вакуумно-дугового синтеза на структурные и магнитные свойства наночастиц NiO

NiO nanoparticles were synthesized using the vacuum arc sputtering method. The influence of synthesis parameters on the structural and magnetic properties of the samples was studied. X-ray diffraction analysis confirms the polycrystalline nature of the resulting nanoparticles under all deposition conditions, but the preferred crystallite orientation depends on the deposition conditions. Magnetic behavior correlates with the crystallite size of NiO nanoparticles. Condensates with particle sizes in the range of 4–6 nm exhibit superparamagnetic behavior, which changes to antiferromagnetic behavior as the particle size increases.

Electrical Detection of Antiferromagnetic Dynamics in Gd - Co Thin Films Using 154-GHz Gyrotron Irradiation

The ultrahigh-frequency magnetization dynamics of antiferromagnets and ferrimagnets is a key property that could be exploited for terahertz technology and spintronics. Despite recent advances in measuring bulk samples, no techniques have been available to characterize such fast dynamics in the thin films that are important for devices. In this Letter the authors use a gyrotron to demonstrate electrical detection of subterahertz magnetization dynamics in thin films, revealing peculiar antiferromagnetic behavior in Gd-Co.

Synthesis, Structure, and Magnetic Properties of Two {Co16IICo4III} Supertetrahedral T4 Clusters Formed from the In Situ Dissociation of a Tertiary N-Containing Ligand

Two mixed-valent cobalt clusters {[(CoII)16(CoIII)4(μ6-O)4(μ3-OH)12(OCH3)12(H2O)8(BMBC)4]·(NO3)8} (1) and {[(CoII)16(CoIII)4(μ3-OH)20(OCH2CH3)4(HOCH2CH3)8(BMBC)4]·(NO3)8} (2) were synthesized and constructed by a semiflexible dicarboxylic ligand 4′,4′-[ammoniobis(methylene)]-bis[(1,1′-biphenyl)-2-carboxylate] (BMBC–) with Co(NO3)2·6H2O under solvothermal systems. Interestingly, the ligand BMBC- is afforded from the in situ dissociation reaction of tertiary N-containing organic carboxylic acid ligands. The complexes present a beautiful supertetrahedral T4 cluster formed by an interior Co4IIIO4 cubane and four exterior Co4IIO4 cubanes bridged via μ6-O2 and μ3-OH– ions and stabilized by four BMBC– organic ligands. The complexes were confirmed by single-crystal X-ray diffraction (XRD), elemental analysis, infrared spectroscopy, and thermogravimetric analysis. Furthermore, the magnetic analyses reveal that the [Co20] cluster exhibits an antiferromagnetic behavior.

Controlling the Magneto-Optical Response in Ultrathin Films of EuO1-x via Interface Engineering with Ferroelectric BaTi2O5.

Utilizing pulsed laser deposition, a film of EuO1-x was deposited onto a Si(001) substrate with MgO buffer and compared to the same heterostructure with an additional BaTi2O5 thin film on top of the EuO1-x surface. X-ray diffraction (XRD) indicates the films crystallize into a preferred EuO(111) orientation; it also reveals the clear presence of EuSi2, which suggests Si or Eu diffuses across the MgO buffer layer. EuO1-x films exhibit a ferromagnetic (FM) signature and temperature-dependent exchange bias, indicated by MOKE measurements, suggesting the presence of a magnetic order well above the EuO Curie temperature with possible origins in charge carrier density near the interface. In comparison, an antiferromagnetic character persists well above the EuO Curie temperature of 69 K and the enhanced Curie temperature of 150 K for BaTi2O5 films grown on the EuO1-x films. The antiferromagnetic behavior is not seen in thicker EuO1-x thin films when integrated with other ferroelectric (FE) phases of the BaO-TiO2 system, suggesting an origin in the perturbed charge population at the BaTi2O5/EuO1-x interface.

A 3D Coordination Polymer Based on Syn-Anti Bridged [Mn(RCOO)2]n Chains Showing Spin-Canting with High Coercivity and an Ordering Temperature of 14 K

A new 3D manganese(II) coordination polymer, formulated as [Mn3(HL)6] (1) (where H2L = 6-hydroxypicolinic acid), has been hydrothermally synthesized and characterized by single-crystal X-ray crystallographic analysis along with other spectroscopic and magnetic techniques. Structural analysis shows that the compound crystallizes in the monoclinic C2/c space group and is a non-porous 3D coordination polymer formed by three different Mn(II) centres connected by 6-hydroxypicolinic acid ligands in their keto form. Each Mn(II) centre shows a distorted octahedral coordination environment. Neighbouring Mn(II) centres are connected by two different syn-anti bridging carboxylate groups to form regular coordination chains. There are two different [Mn2(RCOO)2] units along the chain, formed by two crystallographically independent Mn centres (Mn1 and Mn2). These chains are further connected by HL− ligands to form a 3D coordination network. Interestingly, both the hydroxy and the carboxylate groups of the ligands are deprotonated and coordinated to the metal centres, whereas the pyridyl group is protonated and uncoordinated, although it participates in strong hydrogen bonding interactions with oxygen atoms of the HL− ligand, as shown by the Hirshfeld surface analysis. Both the absorption and emission spectra of the compound have also been measured. Variable temperature magnetic studies reveal the presence of a spin-canted antiferromagnetic behaviour with a high coercivity of 40 mT at 2 K and an ordering temperature of 14 K.

Magnetic and electronic properties of KMn1-xMxBi (M = Cu, Mg, Zn) solid solutions

Materials displaying antiferromagnetic exchange interactions are promising for spintronic applications. The ability to control exchange interactions and electronic properties of antiferromagnetic materials is key in this context. Here, we investigate by means of first-principles calculations to what extent the structural, electronic and magnetic properties of theKMnBi compound can be tailored through chemical doping. It is shown that the KMnBi compound features antiferromagnetic ordering and a direct gap of 0.287 eV. It is found that all solid solutions of KMn0.5M0.5Bi (M = Cu, Mg, Zn) present antiferromagnetic behavior in the ground state. In contrast, the compositions of KMn0.75M0.25Bi (M = Cu, Mg, Zn) are ferrimagnetic with total magnetization of 3.89 μB/cell, 4.45 μB/cell, and 4.41 μB/cell for 25%Cu, 25%Mg and 25%Zn doped KMnBi, respectively. This study shows that the magnetic response of KMnBi can be manipulated to its advantage by appropriately substituting transition metals in the Mn cell site. As a result, transition metal doped KMnBi could have potential applications based on their magnetic response, in particular, in magnetic spintronics.

Magnetic and transport properties of chiral antiferromagnetic Co2−xPdxMo3N thin films

Hall transport and non-collinear magnetoresistance (NCMR) are studied for a chiral antiferromagnet (AFM) with the filled β-Mn-type structure. Magnetic and transport properties of epitaxial thin films of Co2−xPdxMo3N revealed that, in addition to a canted antiferromagnetic behavior above room temperature, thin films with x = 1.01∼1.38 exhibited a transition to a spin spiral state with a higher magnetic moment below TSR of around 50 K, which was assigned to a spin reorientation transition. The low-temperature phase shows both large anomalous Hall effect (AHE) and topological Hall effect (THE). Upon the transition to the canted AFM phase existing up to room temperature, the large AHE still persists with vanishing THE. The behavior of the Hall transport properties coupled with NCMR signals in the current-perpendicular-to-the plane configuration shows the formation of topological spin textures with locally antiferromagnetic order. The present results open the way for the study of topological antiferromagnetic spin textures, manipulation of their properties, and for future spintronic applications.

Manganese and Iron Doped Cadmium Gallate Spinel as a Multifunctional Inorganic Material

Manganese and iron doped cadmium gallate has been synthesized by sol–gel approach. PXRD pattern shows the cubic arrangement of cadmium gallate spinel. Raman spectrum concludes the complete structural analysis of undoped and doped samples. Additionally, morphology and elemental ratio is obtained using FESEM and EDS spectroscopy. Blue indigo and green emission bands are shown in photoluminescence spectra. An excellent antiferromagnetic and ferromagnetic behavior of manganese and iron doped cadmium gallate are shown in the magnetic study. Low band gap of doped samples has made this material as a prominent catalyst for the degradation of methylene blue dye when exposed to UV–visible irradiation.

Structural, optical, photoluminescence, and magnetic properties of Mo0.6−xTi0.3Zn0.1ErxO3 nanorods films fabricated by sol–gel/spin coating technique

Er3+-incorporated Mo0.6−xTi0.3Zn0.1 nanorods thin films were prepared on glass substrates via controlled sol–gel method. The Mo, Zn, Ti, and Er solutions were prepared using ammonium dimolybdate, titanium isopropoxide, zinc acetate dehydrate, and erbium nitrate as the starting material. Ethylene glycol, monoethanolamine, and HCl acid are solvents and solution stabilizers in the sol–gel process. The effect of the Er3+ concentration (0 ≤ x ≤ 0.3 mol%) on the films structure, optical, photoluminescence, and magnetic properties of the nanorods films was investigated by XRD, SEM, Pl, and magnetic measurement. XRD analysis proved that the samples with Er doping = 0.0 and 0.1 consists of single-phase MoO3. By increasing erbium doping to 0.2 and 0.3, bi-phasic were obtained, one of them MoO3 and the other was related to Ti6O11. These results indicate that MoO3 (two-dimensional) can control the internal growth of the Mo0.6−xTi0.3Zn0.1ErxO3 film's structure as supported by SEM and FTIR results. The reflectance of doped films exhibits high values that are increasing with the Er ratio, which adapted an increase in the Eg values from 2.85 to 3.25 eV. The presence of Er3+ in the films is found to sense the photoluminescence process that reveals two emission lines at 1477 and 1543 nm for Er ions. Magnetization behavior for samples exhibits antiferromagnetic behavior with weak ferromagnetic and unsaturated characteristics, where the magnetization at the maximum field (Mmax) increases with increase in Er content.

Structural, magnetic and electrical properties of Y1-xScxFeO3 (x= 0, 0.5 & 1) nanoparticles synthesized by the sol-gel method

Nanoparticles exhibiting crystalline and single-phase characteristics with Y1-xScxFeO3 (x = 0, 0.5 & 1) nanoparticles synthesized by sol-gel method. The sizes of nanocrystals determined by X-Ray Diffractometry (XRD) were obtained between 30 and 39 nm. The shape of nanoparticles and the surface morphology of the samples were carried out using Field Emission Scanning Electron Microscopy (FE-SEM) and energy dispersive spectroscopy (EDS). The magnetic properties of Y1-xScxFeO3 samples were investigated by Vibrating Sample Magnetometry (VSM) and Field-Cooled (FC) and Zero-Field-Cooled (ZFC) measurements. The results showed antiferromagnetic and paramagnetic behaviors for these prepared perovskites. The electrical properties of the samples were investigated by measuring the polarization-electric loops, dielectric constant changes and dielectric loss through frequency and temperature. These measurements showed the TN values of the samples to be 628 and 578 K for YFeO3 and ScFeO3 nanoparticles, respectively. In addition, diffuse reflectance spectroscopy analysis was used to calculate the band gap energy of the samples based on the Kubelka-Munk function. The achieved values showed the band gap energy of 2.97 and 3.07 eV for YFeO3 and ScFeO3.

Solvothermal synthesis of two novel Co(II)-based coordination polymers for the efficient UV-light-driven degradation of methyl violet and magnetic properties

Two novel Co(II) coordination polymers (CPs), formulated as {[Co2(L)(H2O)6]·H2O}n (1) and {[Co(bidpe)2(H2O)2]·H2L·3.5H2O}n (2) (H4L = 3,5-bis(3,4-dicarboxylphenoxy)pyridine, bidpe = 4,4′-bis(lmidazolyl)diphenyl ether), have been solvothermally synthesized and characterized by various techniques. Complex 1 exhibited a 2D→3D supramolecular framework through H-bonds with a point symbol of (12)(4·125)(4) topology. However, with the introduction of additional bibpe ligand, the H4L ligand did not coordinate with Co(II) ions in the synthesis of 2. Complex 2 possessed a 1D [Co(bidpe)2]n loop line, which was further linked by H-bonds to form a 3D supramolecular architecture. In particular, both the CPs exhibited efficient photocatalytic activities towards the degradation of methyl violet (MV) under low-energy irradiation of a 125 W Hg lamp, which could be attributed to their high efficiencies in generating ·OH radicals. Moreover, the variable-temperature magnetic analyses indicated that 1 and 2 exhibit antiferromagnetic behavior between the adjacent Co(II) ions.

Magnetic and Electric Properties of Pyrazole-Based Metal–Organic Frameworks Grafted With a Sulfonic Moiety

We report herein two multifunctional metal–organic frameworks (MOFs) that exhibit excellent mutually inclusive electrical and magnetic properties. Accordingly, two cobalt and nickel based MOFs (Co-MOF, Ni-MOF) were generated using a flexible bispyrazole based ligand and 2-sulphono terephthalic acid. The idea is to generate paramagnetic metal ion based magnetic MOFs, which can also be used to fabricate electrical devices by utilizing the immobilized free sulfonic groups and encapsulated H-bonded water clusters for active charge species generation and transportation. Further support comes from the intriguing structural features of the MOFs that include extensive H-bonded water clusters, free sulfonic acid moiety, or syn-anti bridged carboxylates, which make them highly suitable candidates for generating electrical and magnetic materials. Further complementary support for their candidature comes from the high thermal, chemical, and physical stability of the MOFs. The impedance spectroscopy data and I–V results unequivocally support the suitability of the MOFs for electronic device fabrication showing a befitting conductivity value of 1.80 × 10–4 S/m with an ideality factor of 1.06 for Ni-MOF. Interestingly, the Co-MOF shows a light-dependent behavior with conductivity values of 9.09 × 10–5 S/m (dark) and 6.31 × 10–4 S/m (light) and ideality factors of 0.78 (dark) and 0.92 (light). The MOFs, fitted with a free sulfonic acid moiety and extensive H-bonded water clusters, show high potential for proton exchange membrane fuel cells (PEMFCs) development with corroborating proton conductivity values of 1.95× 10–3 S/cm and 5.80 × 10–4 S/cm for Ni-MOF and Co-MOF, respectively, at 95% relative humidity and 85 °C. Moreover, the interesting structural aspects like syn-anti bridged carboxylates prompt us to explore the magnetic behavior of the MOFs. The Ni-MOF shows some interesting antiferromagnetic behavior. The Co-MOF reveals intriguing single molecule magnet behavior with a Ueff value of 34 K and moderate relaxation time of 3.5× 10–8 s.

Low-temperature ferromagnetism in tensile-strained LaCoO2.5 thin film

The origin of ferromagnetism in epitaxial strained LaCoO3−x films has long been controversial. Here, we investigated the magnetic behavior of a series of oxygen vacancy-ordered LaCoO3−x films on different substrates. Obvious ferromagnetism was observed in perovskite LaCoO3/LSAT (LSAT = (LaAlO3)0.3(SrAlTaO6)0.7) and LaCoO3/SrTiO3 films, while LaCoO3/LaAlO3 films showed weak ferromagnetic behavior. Meanwhile, LaCoO2.67 films exhibited antiferromagnetic behavior. An unexpected low-temperature ferromagnetic phenomenon with a Curie temperature of ∼ 83 K and a saturation magnetization of ∼ 1.2 μ B/Co was discovered in 15 nm thick LaCoO2.5/LSAT thin films, which is probably related to the change in the interface CoO6 octahedron rotation pattern. Meanwhile, the observed ferromagnetism gradually disappeared as the thickness of the film increased, indicating a relaxation of tensile strain. Analysis suggests that the rotation and rhombohedral distortion of the CoO6 octahedron weakened the crystal field splitting and promoted the generation of the ordered high-spin state of Co2+. Thus the super-exchange effect between Co2+ (high spin state), Co2+ (low spin state) and Co2+(high spin state) produced a low-temperature ferromagnetic behavior. However, compressive-strained LaCoO2.5 film on a LaAlO3 substrate showed normal anti-ferromagnetic behavior. These results demonstrate that both oxygen vacancies and tensile strain are correlated with the emergent magnetic properties in epitaxial LaCoO3−x films and provide a new perspective to regulate the magnetic properties of transition oxide thin films.

Structural, dielectric, and leakage current analysis of ‘La’ doped BiMnO3

Multiferroic perovskites simultaneously exhibit ferroelectric, ferromagnetic, and/ antiferromagnetic ordering, as well as spontaneous polarization and magnetization controlled under magnetic and ferroelectric fields, simultaneously. There are many potential applications for multiferroic perovskites in the field of spintronics and magnetoelectric data storage. In the present investigation, we have synthesized and characterized the La-doped BiMnO3 ceramic material at high pressure and temperature by using solid state reaction route. The concentration of La into BiMnO3 at La site in the amount 0%, 2%, 4%, and 8% is fixed by the solid state reaction route and denoted by BML0, BML2, BML4 and BML8. Some impurity phases are observed by the powder X-ray diffraction analysis including the monoclinic structure for all compositions. Nevertheless, we encountered some difficulties while synthesizing BiMnO3 due to the volatile nature of Bi, antiferromagnetic behavior, large leakage current, etc. Enhanced dielectric properties are observed via the dielectric analysis. The reduction in the leakage current is observed with the La doping into BiMnO3.