Structural, magnetic and optical properties of a dilute magnetic semiconductor based on Ce 1−x Co x O 2  thin film grown on LaAlO 3

Mahmoud, Waleed E.; Al-Ghamdi, Ahmed A.; Al-Agel, F.A.; Al-Arfaj, E.A.; Shokr, F.S.; Al-Gahtany, S.A.; Alshahrie, Ahmed; Jalled, Ouissem; Bronstein, Lyudmila M.; Beall, Gary W.

doi:10.1016/j.materresbull.2015.07.044

Cited by 76 publications

(3 citation statements)

References 26 publications

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“…The E g value decreases slightly with the increase of Co doping content. A similar change rule was also found in Co‐doped CeO 2 films prepared by sol–gel method 43 . Doping of Co ions may create ground and the localized d electrons of the Co 2+ in the mid band of CeO 2 .…”

Section: Resultssupporting

confidence: 74%

Structural, optical, and magnetic properties of Co‐doped CeO₂ thin films prepared by radio‐frequency magnetron sputtering

Yang

Zhang

2023

Surface & Interface Analysis

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Co-doped CeO 2 (Ce 1-x Co x O 2 , x = 0, 0.03, and 0.06) thin films were prepared by radio-frequency magnetron sputtering. The structural, optical, and magnetic properties of these films were characterized by X-ray diffraction (XRD), Raman spectroscopy (Raman), atomic force microscopy (AFM), Fourier transform-infrared spectroscopy (FT-IR), spectroscopic ellipsometry (SE), and superconducting quantum interference magnetometer (SQUID). XRD and Raman studies revealed that all the films exhibited single phase of cubic fluorite structure, with highly ( 111) preferred orientation. No Co and Co-related oxide was detected. Compared with undoped CeO 2 films, the defect concentration of Co-doped films increases. AFM images displayed that the film surface morphology is dependent on the Co-doped content. The vibrational band assignment of undoped and Co-doped CeO 2 films was analyzed by FT-IR. The energy dispersion optical constants (the refractive index n and the extinction coefficient k) of Ce 1-x Co x O 2 thin films were obtained by analyzing the SE spectra in the ultraviolet and visible-near infrared (UV-NIR) region (0.5-5.9 eV). The optical band gap energies E g for these films were determined. The E g values of the Ce 1-x-Co x O 2 thin films are 3.35, 3.27, and 3.25 eV, and the n values at wavelength of 632 nm are about 2.35, 2.38, and 2.42 for Co-doped content x = 0, 0.03, and 0.06, respectively. SQUID measurements show that Co-doped CeO 2 films exhibit room temperature ferromagnetism, and the saturation magnetization (M s ) is 0.0051 and 0.0098 emμ/cm 3 with the Co doping content x = 0.03 and 0.06, respectively. The ferromagnetism of Co-doped CeO 2 films belong to the intrinsic magnetism of the films.

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Section: Resultssupporting

confidence: 74%

Structural, optical, and magnetic properties of Co‐doped CeO₂ thin films prepared by radio‐frequency magnetron sputtering

Yang

Zhang

2023

Surface & Interface Analysis

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“…This is explained by the incorporation of smaller Co 2+ and/or Co 3+ cations into the Ce 4+ ion sites 38 , leading to a decrease in unit cell volume. However to accommodate the change in size, some authors proposed that up to 5 at%, the incorporation of Co 2+ causes the reduction of Ce 4+ into Ce 3+ leading to the reverse observation, that means namely to the increase of crystallite size and lattice parameter 39,40 with shift to lower angles. The decrease in crystallite size is generally accompanied with the increase of specific surface area 37,41 .…”

Section: Structural Propertiesmentioning

confidence: 99%

Au/Co promoted CeO₂ catalysts for formaldehyde total oxidation at ambient temperature: role of oxygen vacancies

Rochard

Giraudon

Liotta

et al. 2019

Catal. Sci. Technol.

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“…b), which gives rise to the decrease of the lattice constant of the cubic InP crystallites due to the increase of the Cr ions contents in the InP crystal structure. To confirm this conclusion, the lattice parameter, a , of the In 1– x Cr x P QDs was calculated based on the following equations

d = ([]|, \frac{a}{{(h^{2} + k^{2} + l^{2})}^{\frac{1}{2}}})

…”

Section: Resultsmentioning

confidence: 99%

Synthesis and characterization of surface patterned nanoimprinted in_1–_xCr_xP/P(VDF‐TrFE) nanocomposite films for solar cell application potential

et al. 2017

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Nanoimprinted nanocomposites based on the inclusion of semiconductor quantum dots (QDs) into ferroelectric polymer matrix have shown a paramount encouragement owing to their versatile applications, such as field effect transistors, lasers, LEDs, bio‐probes, metal ion sensors, and photovoltaic devices. Here, we have developed a novel approach to fabricate nanoimprinted In1–xCrxP/P(VDF‐TrFE) nanocomposite films based on the nanoimprint lithography stamp technique for the first time. In1–xCrxP QDs have been prepared by colloidal technique at various contents of Cr ions from 1 at% to 9 at%. These QDs were doped into P(VDF‐TrFE). The prepared nanocomposite films were characterized by X‐ray diffraction, transmission electron microscopy, energy dispersive spectroscopy, Fourier transform spectroscopy, and atomic force microscopy. The thermal properties were investigated by thermogravimetric and differential scanning calorimetry. The inclusion of the In1–xCrxP QDs into the P(VDF‐TrFE) nanocomposites resulted in an enhancement of the thermal stability, an increase of the melting temperature and decrease of the Curie temperature. The nanoimprinted In0.91Cr0.09P/P(VDF‐TrFE) nanocomposite film showed high photocurrent response. The generated electromotive force, emf, in the nanoimprinted films was five times greater than the flat deposited film. Therefore, the developed surface pattern nanocomposite film based on In1–xCrxP/P(VDF‐TrFE) nanocomposite will open a new avenue for the flexible solar cell application potential. POLYM. COMPOS., 40:E136–E145, 2019. © 2017 Society of Plastics Engineers

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Structural, magnetic and optical properties of a dilute magnetic semiconductor based on Ce 1−x Co x O 2 thin film grown on LaAlO 3

Cited by 76 publications

References 26 publications

Structural, optical, and magnetic properties of Co‐doped CeO₂ thin films prepared by radio‐frequency magnetron sputtering

Structural, optical, and magnetic properties of Co‐doped CeO₂ thin films prepared by radio‐frequency magnetron sputtering

Au/Co promoted CeO₂ catalysts for formaldehyde total oxidation at ambient temperature: role of oxygen vacancies

Synthesis and characterization of surface patterned nanoimprinted in_1–_xCr_xP/P(VDF‐TrFE) nanocomposite films for solar cell application potential

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Structural, magnetic and optical properties of a dilute magnetic semiconductor based on Ce 1−x Co x O 2 thin film grown on LaAlO 3

Cited by 76 publications

References 26 publications

Structural, optical, and magnetic properties of Co‐doped CeO2 thin films prepared by radio‐frequency magnetron sputtering

Structural, optical, and magnetic properties of Co‐doped CeO2 thin films prepared by radio‐frequency magnetron sputtering

Au/Co promoted CeO2 catalysts for formaldehyde total oxidation at ambient temperature: role of oxygen vacancies

Synthesis and characterization of surface patterned nanoimprinted in1–xCrxP/P(VDF‐TrFE) nanocomposite films for solar cell application potential

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Product

Resources

About

Structural, optical, and magnetic properties of Co‐doped CeO₂ thin films prepared by radio‐frequency magnetron sputtering

Structural, optical, and magnetic properties of Co‐doped CeO₂ thin films prepared by radio‐frequency magnetron sputtering

Au/Co promoted CeO₂ catalysts for formaldehyde total oxidation at ambient temperature: role of oxygen vacancies

Synthesis and characterization of surface patterned nanoimprinted in_1–_xCr_xP/P(VDF‐TrFE) nanocomposite films for solar cell application potential