Effect of Mn doping concentration on structural, vibrational and magnetic properties of NiO nanoparticles

Patel, Kuldeep; Deshpande, M. P.; Chauhan, Krishna Dutt; Rajput, Piyush; Gujarati, Vivek P.; Pandya, Swati; Sathe, Vasant; Chaki, Sunil H.

doi:10.1016/j.apt.2018.06.018

Cited by 59 publications

(21 citation statements)

References 38 publications

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“…This condition shows that the crystallinity of the asdeposited sample is poor and the formation of NiO is still unfinished. 9 For this non-annealed situation, it can be said that the sample exhibits antiferromagnetic behaviour due to the synthesis occurring below the Néel temperature of approximately 523 K. 7 The high background noise from the XRD pattern could be attributed to the low crystallinity properties and thickness of the samples. [24][25][26] Figure 4(b) to (f) shows the XRD patterns annealed at different temperatures.…”

Section: Structural Analysismentioning

confidence: 99%

“…Patel et al also conducted the same percentages of Mn (0-6 at%) to study their effect on the structural, vibrational and magnetic properties of NiO using a chemical precipitation route with the addition of a polymer. 7 The lattice parameter decreased with increasing Mn concentration. The synthesised undoped and Mn-doped NiO nanoparticles exhibited weak ferromagnetic and superparamagnetic behaviour at room temperature.…”

Section: Introductionmentioning

confidence: 97%

“…This behaviour is due to Ni vacancies or doping with other cations. [5][6][7] Parimon et al reported NiO-based humidity sensors designed on seedless and seed-coated glass substrates with high sensitivities of 138 and 257, respectively. 8,9 In addition, the authors also successfully fabricated hierarchical NiO nanosheet/ nanoball-flower-like structure films for humidity sensors at low immersion temperatures with a highest sensitivity of 169.…”

Section: Introductionmentioning

confidence: 99%

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Annealing temperature dependency of structural, optical and electrical characteristics of manganese-doped nickel oxide nanosheet array films for humidity sensing applications

Parimon

Mamat

Banu

et al. 2021

Nanomaterials and Nanotechnology

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Manganese-doped nickel oxide nanosheet array films are successfully prepared on a nickel oxide seed-coated glass substrate by an immersion method. Various annealing temperatures between 300°C and 500°C are applied to the manganese-doped nickel oxide nanosheet array films to study their effect on the properties of nickel oxide, including humidity sensing performance. Field emission scanning electron microscopy (FESEM), energy dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD), ultraviolet–visible (UV–vis) spectrophotometry, a two-probe current–voltage ( I- V) measurement system and a humidity measurement system are used to characterise the heat-treated manganese-doped nickel oxide samples. The effect of annealing temperature can be clearly observed for the different surface morphologies and diffraction patterns. The samples exhibit average crystallite size increases of 0.63–10.13 nm with increasing annealing temperature. The dislocation density, interplanar spacing, lattice parameter, unit cell volume and stress/strain are also determined from the XRD data. The average transmittances in the visible region for all samples show low percentages with the highest transparency of 50.7% recorded for manganese-doped nickel oxide annealed at 500°C. The optical band gap shows a decreasing trend with increasing annealing temperature. The I- V measurement results reveal that manganese-doped nickel oxide displays improved conductivity values with increasing annealing temperature. The sensitivity of the humidity sensors shows an ascending curve with increasing temperature. The optimal device performance is obtained with annealing at 500°C, with the highest sensitivity of 270 and the fastest response and recovery times. In contrast, the sample for annealing at 300°C shows poor sensing performance.

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Section: Structural Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

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Annealing temperature dependency of structural, optical and electrical characteristics of manganese-doped nickel oxide nanosheet array films for humidity sensing applications

Parimon

Mamat

Banu

et al. 2021

Nanomaterials and Nanotechnology

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“…The broad absorption peak at about 3446 cm is attributed to the O-H stretching vibration of interlayer water molecules and H-bound of OH group and the band near 1621 cm is assigned to H-O-H bending vibrations. The band at 1384 cm is the characteristic of NO 3-interlayer [33,34]. The small presence of nitrates in the samples may worsen the characteristic behavior of NiO.…”

Section: Ft-ir Spectroscopymentioning

confidence: 99%

Calcination Temperature Reflected Structural, Optical and Magnetic Properties of Nickel Oxide

et al. 2022

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Stoichiometric compositions of NiO were prepared by the standard chemical co-precipitation method to inspect the effect of the calcination temperature on structures, morphology, and physical properties. The samples were calcined at three different temperatures viz. 350 °C, 550 °C, and 650 °C for 5 h. X-ray diffraction analysis confirmed the cubic (Fm-3m) structure of the prepared samples. The average crystalline size increases from 41 nm to above 100 nm as the calcination temperature increases in the same time period. In Fourier transform infrared spectra, the spectral absorption bands were observed at ~413, 434, and 444 cm–1. The bandgap energy of NiO particles is decreased from 3.6 eV to 3.41 eV as the calcination temperature increases. The magnetic analysis confirms that the magnetization value of NiO is invariably decreased with a rise in the calcination temperature.

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“…In this case, we strongly considered one thing as the anti-ferromagnetic property of NiO could be responded as to behaves a ferromagnetic material had Ni 2? surface spins, while it reached out the scale of nano-dimension [42]. We analyzed some modifications and impacts in crucial in Table 4.…”

Section: Magnetic Studiesmentioning

confidence: 99%

Effect of co-dopant proportion on the structural, optical and magnetic properties of pristine NiO nanoparticles synthesized by Sol–gel method

Jothibas

Bharanidharan

Paulson

et al. 2021

J Mater Sci: Mater Electron

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In this present work, the pristine and the different percentages of co-doped NiO nanoparticles have been successfully synthesized through the sol-gel method. The X-ray diffraction (XRD), Scanning Electron Microscopy (SEM), UV-Visible spectroscopy (UV-Vis), Fourier Transform Infra-Red Spectroscopy (FT-IR), and Vibrating Sample Magnetometer (VSM) were used to study the structural, morphological, optical, functional, and magnetic properties of the synthesized materials. The XRD patterns confirmed the formation of cubic phased NiO with their crystallite size, microstrain, dislocation density was estimated, and the average crystallite size increased with co-dopant inclusion. By introducing the co-dopant proportion in NiO lattice, the intensity of optical absorption was found to increase and the optical bandgap decreased from (E g = 3.6, 3.54, 3.50 eV) due to quantum size effect. SEM result exhibits that the particles are spherical-shaped morphology. The VSM examination shows the magnetic transition of soft to hard-ferromagnetism in room temperature on Zn, Mn codopant ions occupying Ni translational symmetry.

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Effect of Mn doping concentration on structural, vibrational and magnetic properties of NiO nanoparticles

Cited by 59 publications

References 38 publications

Annealing temperature dependency of structural, optical and electrical characteristics of manganese-doped nickel oxide nanosheet array films for humidity sensing applications

Annealing temperature dependency of structural, optical and electrical characteristics of manganese-doped nickel oxide nanosheet array films for humidity sensing applications

Calcination Temperature Reflected Structural, Optical and Magnetic Properties of Nickel Oxide

Effect of co-dopant proportion on the structural, optical and magnetic properties of pristine NiO nanoparticles synthesized by Sol–gel method

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