Magnetotransport properties of Fe substituted Ca<sub>3</sub>CoMnO<sub>6</sub>

Thankachen, Nisha; Sengunthar, Poornima; Patel, Shivangi; Pandya, Rutvi J.; Joshi, U. S.

doi:10.1088/1402-4896/ac1fe2

Cited by 13 publications

(3 citation statements)

References 42 publications

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“…X-ray Analysis: Structural analysis of the synthesized powders was carried out using X-ray diffraction with monochromatic Cu-kα1 radiation with 1.5406 Å at ambient conditions. [8] The Xrd pattern of GO and T.rGO is shown in figure 1. Generally, graphite exhibits a (002) basal reflection around 2θ = 26.55˚ corresponding hexagonal structure.…”

Section: Resultsmentioning

confidence: 99%

Controlled Synthesis of Reduced Graphene Oxide Sheets on Large Scale Using Thermal Exfoliation

Sengunthar¹,

Patel²,

Thankachen³

et al. 2022

ECS Trans.

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Oxidized graphene-based materials have been widely studied due to its excellent properties like mechanical, electrical, high chemical stability, high thermal conductivity, and large specific area. Particularly, graphene oxide (GO) and reduced graphene oxide (rGO) has grabbed much attention for wide range of applications. Here we report on synthesis and characterization of GO and rGO via modified Hummer’s method and thermal exfoliation. Single hexagonal phase was confirmed via X-ray diffraction. Morphology and chemical composition were analyzed using field emission scanning electron microscopy and energy dispersive X-ray analysis. Further to study the degree of disorder Raman spectrum were recorded at room temperature. The optical properties were examined by UV-spectroscopy in the diffused reflectance spectroscopy mode. These findings are a demonstration of scalable synthesis of graphene derivatives for its function applications.

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Section: Resultsmentioning

confidence: 99%

Controlled Synthesis of Reduced Graphene Oxide Sheets on Large Scale Using Thermal Exfoliation

Sengunthar¹,

Patel²,

Thankachen³

et al. 2022

ECS Trans.

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“…The evidently clear weakening of peak intensities with increase in fluence corresponding to BSFO, CFO and LNO suggest the gradual amorphization of the sample [8,12,18]. Average crystallite size (D) taken from the XRD peaks were calculated using Scherrer's formula [19,20] and are given below confirming the nano structure of the thin film. The results are summarized in table 1.…”

Section: X-ray Diffractionmentioning

confidence: 92%

Magnetic field control and swift heavy ion beam assisted tuning of resistive switching properties of BSFO/CFO/LNO heterostructures

Thankachen¹,

Chhaya²,

Tripathi³

et al. 2023

Phys. Scr.

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Resistive switching (RS) behavior in mixed oxide insulators has shown a great promise as memristors or non-volatile resistive random-access memory (RRAM) applications. For dilute magnetic oxide multilayers, a novel approach of controlled defects induced and the magnetic field control of RS behavior is proposed. Resistive switching in Bi0.6Sr0.4FeO3 /CoFe2O4 /LaNiO3 (BSFO /CFO /LNO) multilayer heterostructures has been investigated as a case study. All oxide junctions consisting of conducting LaNiO3 (LNO) bottom electrode and BSFO-CFO active layers were fabricated by using chemical solution deposition. A set of samples were irradiated with 150 MeV Ag11+ ions for three different ion fluence of ~ 1×10+11 ions/cm2, 1×10+12 ions/cm2 and 5×10+12 ions/cm2. Polycrystalline phase pure films with smooth, crack free surfaces were observed for pristine and irradiated samples. Optical spectroscopy revealed a decrease in the transmittance upon increasing ion fluence due to increase in the light scattering centres. The optical band gap showed a systematic decrease from 2.09 eV to 1.65 eV with increasing ion fluence. Room temperature I-V characteristics showed consistent and pronounced bipolar switching for all samples below ± 5 V. Upon applied magnetic fields of 0.58 T, the resistive switching ratios were found to increase significantly and were further tuned by 150 MeV Ag11+ ion beam irradiations. The magnetic field control of electrical transport properties in the controlled defect assisted oxide heterojunctions offers new insights to the existing understanding of oxide-based RS mechanism.

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“…With the application of external magnetic field, there is an increase in the value of resistance, i.e., positive MR. This means that there is negligible change in the carrier charge concentrations [17]. Catalan has also termed such type of magnetoresistance behavior can be due to core dominated Colossal Magnetoresistance (CMR) effect and Maxwell -Wagner polarization effect [17][18][19].…”

Section: 𝑴 = 𝑯 − × % [ ]mentioning

confidence: 99%

Growth, Structural, and Electrical Properties of Spin Coated LaNiO₃Conducting Oxide

et al. 2022

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LaNiO3 (LNO) perovskite oxide thin film nanostructure has been prepared using spin coating technique for its homogenous growth, and structural and electrical properties on quartz substrate. X-ray diffraction (XRD) confirmed standard cubic perovskite symmetry. Surface morphological measurements were carried out using atomic force microscope (AFM), which shows uniform, smooth, and crack free surface with RMS roughness of 7.08 nm. This oxide based conducting layer can act as an excellent conducting bottom/top electrode providing brilliant seeding or buffer layer for subsequent ferroelectric/ferromagnetic layers. This incorporates that it can act as an excellent conducting bottom electrode. I-V characteristics of LNO demonstrated a small shift in current with the application of low perpendicular magnetic field of 0.58T. p-type conduction. Average hole concentration of 3.66 x 10+17 cm-2 was estimated from the Hall effect measurements. The magnetoresistance (MR) of the sample was found to be +48.26%.

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Magnetotransport properties of Fe substituted Ca₃CoMnO₆

Cited by 13 publications

References 42 publications

Controlled Synthesis of Reduced Graphene Oxide Sheets on Large Scale Using Thermal Exfoliation

Controlled Synthesis of Reduced Graphene Oxide Sheets on Large Scale Using Thermal Exfoliation

Magnetic field control and swift heavy ion beam assisted tuning of resistive switching properties of BSFO/CFO/LNO heterostructures

Growth, Structural, and Electrical Properties of Spin Coated LaNiO₃Conducting Oxide

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Magnetotransport properties of Fe substituted Ca3CoMnO6

Cited by 13 publications

References 42 publications

Controlled Synthesis of Reduced Graphene Oxide Sheets on Large Scale Using Thermal Exfoliation

Controlled Synthesis of Reduced Graphene Oxide Sheets on Large Scale Using Thermal Exfoliation

Magnetic field control and swift heavy ion beam assisted tuning of resistive switching properties of BSFO/CFO/LNO heterostructures

Growth, Structural, and Electrical Properties of Spin Coated LaNiO3 Conducting Oxide

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Magnetotransport properties of Fe substituted Ca₃CoMnO₆

Growth, Structural, and Electrical Properties of Spin Coated LaNiO₃Conducting Oxide