Preparation of SrFeO3-X Thin Films by the Spin-Coating Method and its Gas Sensing Properties

Majid, Abdul; Gollner, Egmont; Matam, Mahesh; Tunney, James J.; Post, Michael L.

doi:10.1557/proc-0972-aa12-05

Cited by 3 publications

(1 citation statement)

References 23 publications

(25 reference statements)

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“…At room temperature to 300 °C the samples undergo a slight weight loss (~0.20%) which corresponds to the removal of water and residual organic matter from the Sol-Gel process [ 32 , 33 ]. From 300 °C to 600 °C, samples undergo a rapid process, losing about 5% of their initial mass accompanied by different thermal events, which corresponds to the weight loss associated with the reduction reaction of the material (Equation (1)): Pr 0.7 Sr 0.3 Mn 1−x Co x O 3 →(0.7/2)·Pr 2 O 3 + 0.3·SrO + (1−x)·MnO + x·Co …”

Section: Resultsmentioning

confidence: 99%

Effects of Partial Manganese Substitution by Cobalt on the Physical Properties of Pr0.7Sr0.3Mn(1−x)CoxO3 (0 ≤ x ≤ 0.15) Manganites

et al. 2023

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We have investigated the structural, magnetic, and electrical transport properties of Pr0.7 Sr0.3 Mn(1−x)Cox O3 nanopowders (x = 0, 0.05, 0.10 and 0.15). The Pechini Sol-gel method was used to synthesize these nanopowders. X-ray diffraction at room temperature shows that all the nano powders have an orthorhombic structure of Pnma space group crystallography. The average crystallite size of samples x = 0, 0.05, 0.10, and 0.15 are 33.78 nm, 29 nm, 33.61 nm, and 24.27 nm, respectively. Semi-quantitative chemical analysis by energy dispersive spectroscopy (EDS) confirms the expected stoichiometry of the sample. Magnetic measurements indicate that all samples show a ferromagnetic (FM) to paramagnetic (PM) transition with increasing temperature. The Curie temperature TC gradually decreases (300 K, 270 K, 250 K, and 235 K for x = 0, 0.05, 0.10, and 0.15, respectively) with increasing Co concentrations. The M-H curves for all compounds reveal the PM behavior at 300 K, while the FM behavior characterizes the magnetic hysteresis at low temperature (5 K). The electrical resistivity measurements show that all compounds exhibit metallic behavior at low temperature (T < Tρ) well fitted by the relation ρ = ρ0 + ρ2T2 + ρ4.5T4.5 and semiconductor behavior above Tρ (T > Tρ), for which the electronic transport can be explained by the variable range hopping model and the adiabatic small polaron hopping model. All samples have significant magnetoresistance (MR) values, even at room temperature. This presented research provides an innovative and practical approach to develop materials in several technological areas, such as ultra-high density magnetic recording and magneto resistive sensors.

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Section: Resultsmentioning

confidence: 99%

Effects of Partial Manganese Substitution by Cobalt on the Physical Properties of Pr0.7Sr0.3Mn(1−x)CoxO3 (0 ≤ x ≤ 0.15) Manganites

et al. 2023

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Gas-Sensing Characteristics of SrFeO3−δ Thin Film Probed by a Homemade Apparatus

Manikandan

Kumar

Raj

et al. 2018

Journal of Elec Materi

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Molten salt synthesis of SrFeO3 nanocrystals

Yang¹,

Li³

et al. 2011

J. Ceram. Soc. Japan

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Pure perovskite compound SrFeO 3 nanocrystals were successfully synthesized in molten NaNO 3 KNO 3 eutectic with Na 2 O 2 from a mixture of strontium nitrate and ferric nitrate. The effect of metal precursors, salt medium, annealing temperature (mainly 400800°C), and oxidizing properties of the melt on the phase composition, crystallite size and morphology of the resulting metal oxides were systematically studied by simultaneous TG/DSC, X-ray diffraction (XRD), scanning electron microscopy (SEM) methods. The results showed that the formation of the SrFeO 3 phase mainly depended on the nature of the metal precursor and salt medium. It was found that metal nitrates are the suitable precursors and NaNO 3 KNO 3 eutectic with Na 2 O 2 is the suitable salt medium, which results in the formation of pure SrFeO 3 nanocrystals at a much lower temperature of 400°C.

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Preparation of SrFeO3-X Thin Films by the Spin-Coating Method and its Gas Sensing Properties

Cited by 3 publications

References 23 publications

Effects of Partial Manganese Substitution by Cobalt on the Physical Properties of Pr0.7Sr0.3Mn(1−x)CoxO3 (0 ≤ x ≤ 0.15) Manganites

Effects of Partial Manganese Substitution by Cobalt on the Physical Properties of Pr0.7Sr0.3Mn(1−x)CoxO3 (0 ≤ x ≤ 0.15) Manganites

Gas-Sensing Characteristics of SrFeO3−δ Thin Film Probed by a Homemade Apparatus

Molten salt synthesis of SrFeO3 nanocrystals

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