Grain size-induced structural, magnetic and magnetoresistance properties of Nd0.67Ca0.33MnO3 nanocrystalline thin films

Göktaş, A.; Tumbul, Ahmet; Aslan, Ferhat

doi:10.1007/s10971-016-3960-0

Cited by 41 publications

(18 citation statements)

References 27 publications

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“…Here, D, ξ, Γ, κ, and λ are crystallite size, lattice strain, full-width half maxima, Scherrer constant (�0.9), and X-ray wavelength [20][21][22]. From the calculations, it was observed that the average crystallite size decreased with the increase in ZnS concentration (Figure 4).…”

Section: Crystallite Size and Lattice Strainmentioning

confidence: 96%

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Synthesis and Characterizations of CH3NH3PbI3 : ZnS Microrods for Optoelectronic Applications

Ahmed

Islam

Bashar

et al. 2022

Advances in Materials Science and Engineering

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Organometallic perovskite is one of the potential materials in the various optoelectronic research fields. This study demonstrates the synthesis of CH3NH3PbI3 : ZnS microrods via one-step spin coating for optoelectronic applications. Incorporation of ZnS in the perovskite material caused bandgap variation in the visible wavelength range. Structural and chemical properties have been observed using X-ray diffraction, scanning electron microscope, and Fourier transform infrared spectroscopy. The optical and electrical properties were studied via UV-Vis spectroscopy and impedance analyzer. The addition of ZnS caused to increase the optical absorption coefficient from ∼104 cm−1 to ∼105 cm−1. The bandgaps of the thin films were calculated using the Tauc relation and electrical method, obtained in the range 1.51 eV–1.64 eV, suitable for various optoelectronic applications.

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Section: Crystallite Size and Lattice Strainmentioning

confidence: 96%

“…Both crystallite size and lattice strain affect the Bragg peaks through broadening and shifting. e crystallite sizes and lattice strains are calculated from equations ( 1) and (2) [20][21][22] and are listed in Table 2.…”

Section: Crystallite Size and Lattice Strainmentioning

confidence: 99%

Synthesis and Characterizations of CH3NH3PbI3 : ZnS Microrods for Optoelectronic Applications

Ahmed

Islam

Bashar

et al. 2022

Advances in Materials Science and Engineering

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“…The measurement of the electrical properties of materials requires powerful tools to explore the electrical behavior, and that is through modeling them by an equivalent circuit 33 . In this method we apply a sinusoidal disturbance of constant amplitude and a variable frequency to determine the conduction properties of a polycrystalline oxide and also, in theory, the different contributions to the conduction of a material (grains, grain boundaries, Pores, defects) 16,30,34 It also characterizes the different electrically active regions in the material and demonstrates their existence by their individual electrical properties. The electrical behavior of our films described in terms of one of the four complex expressions 35 , each consists of real and imaginary component.…”

Section: Impedance Spectroscopymentioning

confidence: 99%

Structural, optical and electrical properties of Ni-doped Co3O4 prepared via Sol-Gel technique

et al. 2018

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In this article, Nickel doped Cobalt oxide thin films and powders have been prepared on glass substrates using sol gel based dip coating process in order to investigate their optical, structural and electrical properties. The Ni concentration was changed from 0 to 9 wt(%).The synthesized samples were characterised by Ultraviolete visible analysis, X-ray diffraction, Fourier transform infrared spectroscopy and Complex impedance spectroscopy to depict the optical, structural, vibrational and electrical properties. Our structural results show that the obtained samples were composed of (Co 3 O 4) polycrystalline with spinel-type preferentially oriented in the (311) plane. Our optical results show that the films have high transparency over the visible region (85% for Co 3 O 4 and ~ 60-75% for all doped samples). The optical band gaps were found to be (E g1 = 1.50 eV, E g2 = 2.20 eV) and (E g1 = 1.42 eV, E g2 = 2.07 eV) for the case of (pure Co 3 O 4 and 9% Ni-doped Co 3 O 4) respectively. The complementary phase information is provided by FT-IR spectroscopy. FT-IR spectra confirms the presence of Co 2+-O and Co 3+-O vibrations in the spinel lattice. The Nyquist plots suggests that the equivalent circuit of our films is an parallel circuit R p C p. It was found that the resistance Rp decreases whereas the capacity Cp increases with increasing doping levels.

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“…The decrease in the value of the electrical resistivity is assigned to the larger crystallite sizes that were achieved via increased W substitution content. Other studies which connected the effect of the crystallites sizes with the value of electrical resistivity reported the larger the crystallite sizes, the lower the electrical resistivity 26 . On the other hand, the Arrhenius plots of the resistivity are displayed in Figure 4.…”

Section: ( )mentioning

confidence: 96%

Structural, Optical and Electrical Properties of Bi1.5Zn0.92Nb1.5-6x/5WxO6.92 Pyrochlore Ceramics

2021

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Herein, the structural, morphological, compositional, optical, electrical and dielectric properties of Bi 1.5 Zn 0.92 Nb 1.5-6x/5 W x O 6.92 (BZN) solid solutions are reported. Tungsten substituted BZN ceramics which are fabricated by the solid state reaction technique exhibited solubility limits at substitution level below x=0.18. Remarkable engineering in the structural, optical, electrical and dielectric properties of the pyrochlore ceramics is achieved via W substitution. Namely, shrinkage in both of the lattice parameters and in the energy band gap accompanied with decrease in the microstrain, in the dielectric constant and in the electrical resistivity is observed upon increasing the W content below the solubility limit. The increase in the W content in the BZN ceramics enhances the densification of the pyrochlore and leads to higher light absorbability and larger crystallites growth. The temperature dependent electrical resistivity measurements has also shown that the pyrochlore exhibit thermal stability below 380 K.

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Grain size-induced structural, magnetic and magnetoresistance properties of Nd0.67Ca0.33MnO3 nanocrystalline thin films

Cited by 41 publications

References 27 publications

Synthesis and Characterizations of CH3NH3PbI3 : ZnS Microrods for Optoelectronic Applications

Synthesis and Characterizations of CH3NH3PbI3 : ZnS Microrods for Optoelectronic Applications

Structural, optical and electrical properties of Ni-doped Co3O4 prepared via Sol-Gel technique

Structural, Optical and Electrical Properties of Bi1.5Zn0.92Nb1.5-6x/5WxO6.92 Pyrochlore Ceramics

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