Oxygen vacancy-dependent microstructural, optical and magnetic properties of sol-gel Tb0.2 Er1 Y2.8 Fe5 O12 films

Elhamali, Suleiman M.; Ibrahim, Noor Baa`Yah; Radiman, Shahidan

doi:10.1016/j.jmmm.2019.166048

Cited by 22 publications

(7 citation statements)

References 48 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is clearly observed that the typical TEM micrograph of spent EC5YIG sample consisted of rod like nanoparticles, some of them being agglomerated (Figure 8D1). This was consistent with the morphological features of the garnets assessed by SEM analyses [15,39,50]. Some of these regions appeared with isolated nanoparticles, as shown in Figure 8D2.…”

Section: Morphological and Surface Propertiessupporting

confidence: 87%

“…The Y 3d core-level spectrum was fitted in a doublet of Y 3d 5/2 and Y 3d 3/2 components (Figure 9b). The corresponding binding energies of 157.1 eV and 159.1 eV were due to Y 3+ ions in dodecahedral position certifying the maintenance of the YIG structure [37,50]. The Y 3d core-level of the fresh garnet was similar to that of the spent solids, as illustrated in a previous work [35].…”

Section: Morphological and Surface Propertiessupporting

confidence: 69%

“…The O 1s core levels spectra clearly displayed contributions at 529.7, 531.4 eV and 532.9 eV for all solids (Figure 9e). Importantly, the main and most intense peak at 529.7 eV came from the lattice oxygen of the Fe−O and Y−O bonds [36,37,50]. At 532.9 eV, both surface hydroxyl group and adsorbed water molecules appeared concomitantly with the C-OH and/or C-O-C groups, as shown previously [5,36].…”

Section: Morphological and Surface Propertiessupporting

confidence: 68%

“…This corresponded to the presence Cr 3+ oxidation state in the garnets [51]. On the basis of existing literature, the Er 3d 5/2 signal was observed at 168.7 eV as Er 3+ ions [50,52]. However, the Er 3d signal was absent, as the Y 3d lines appeared in a region close to that of Er, e.g., 164-172 eV, when using Al-Kα radiation.…”

Section: Morphological and Surface Propertiesmentioning

confidence: 77%

See 3 more Smart Citations

Cr-Containing Rare-Earth Substituted Yttrium Iron Garnet Ferrites: Catalytic Properties in the Ethylbenzene Oxidation

et al. 2022

View full text Add to dashboard Cite

A series of the Cr-containing erbium substituted yttrium iron garnet ferrites (ECYIG) was synthesized with distinct Cr amounts, herein referred to as Y3(Er0.02Fe5Cr1−x)O12, where x refers to Cr amounts from 0 to 0.05. The catalytic performance of the solids was investigated in ethylbenzene oxidation in the presence of hydrogen peroxide to assess the role of Cr and Er present in the YIG garnet lattice for fine chemistry compound production. Raman spectroscopy, HRTEM, EPR and FTIR revealed that the insertion of Er (at a fixed amount of 2%) in dodecahedral sites had a great impact on the catalytic activity of the garnets. Both Er3+ and Y3+ in the lattice simultaneously provided structural stability to the garnet structure in any harsh environment. XPS and EPR indicated that the Cr3+ ions replaced those of Fe3+ located in both octahedral and tetrahedral sites of the YIG garnets. The Cr3+ ions acted as electronic promoter to increase the oxidation rate of the Fe3+ active species responsible for activating the EB molecule. SEM-EDS demonstrated that the solids having Cr amounts lower than 4% experienced the most severe deactivation due to the Cr leaching and strong carbon species adsorption on the surface of the catalysts, which decreased their efficiency in the reaction.

show abstract

Section: Morphological and Surface Propertiessupporting

confidence: 87%

Section: Morphological and Surface Propertiessupporting

confidence: 69%

Section: Morphological and Surface Propertiessupporting

confidence: 68%

Section: Morphological and Surface Propertiesmentioning

confidence: 77%

See 2 more Smart Citations

Cr-Containing Rare-Earth Substituted Yttrium Iron Garnet Ferrites: Catalytic Properties in the Ethylbenzene Oxidation

et al. 2022

View full text Add to dashboard Cite

show abstract

“…There are several methods to prepare the magnetic garnet films by using spin-coating methods. The metal-organic decomposition method [ 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 ] and the sol-gel method [ 24 , 25 , 26 , 27 , 28 , 29 , 30 ] are generally used, but heat treatment at the temperature from 600 to 900 °C. is necessary as with the sputtering method.…”

Section: Introductionmentioning

confidence: 99%

Properties of Magnetic Garnet Films for Flexible Magneto-Optical Indicators Fabricated by Spin-Coating Method

et al. 2022

View full text Add to dashboard Cite

Non-destructive testing using a magneto-optical effect is a high-resolution non-destructive inspection technique for a metallic structure. It is able to provide high-spatial resolution images of defects. Previously, it has been difficult to fabricate flexible magneto-optical sensors because thermal treatment is necessary to crystallize the magnetic garnet. Therefore, it was not possible to apply magneto-optical imaging to complicated shapes in a test subject, such as a curved surface. In this study, we developed a new process for deposition of the magnetic garnet on the flexible substrate by applying the magnetic garnet powders that have already undergone crystallization. In this new process, as it does not require thermal treatment after deposition, flexible substrates with low heat resistance can be used. In this paper, we report our observations of the optical properties, magnetic hysteresis loop, crystallizability and density of the particles on the flexible substrate deposited by the spin-coating method.

show abstract

Coral‐Inspired Terahertz‐Infrared Bi‐Stealth Electronic Skin

Li,

Pan,

et al. 2024

Angewandte Chemie

View full text Add to dashboard Cite

The development of electronic skin with dual stealth functionality is crucial for enabling devices to operate effectively in dynamic electromagnetic environments, thereby facilitating intelligent electromagnetic protection for autonomous perception. However, achieving compatibility between terahertz (THz) and infrared (IR) stealth technologies remains largely unexplored due to their inherent contradictions. Herein, inspired by natural corals, a novel coral‐like multi‐scale composite foam (CMSF) was proposed that ingeniously reconciles these contradictions. The design capitalizes on the conductive network and heat insulation properties of the foam skeleton, the loss effects and low infrared emission of metal particles, and the infrared transparency of magneto‐optical materials. This approach leads to the realization of a THz‐IR bi‐stealth electronic skin concept. The CMSF exhibits a maximum reflection loss of 84.8 dB in the terahertz band, while its infrared stealth capability ensures environmental adaptability under varying temperatures. Furthermore, the electronic skin exhibits exceptional sensitivity and reliability as a wearable device for perceiving environmental changes. This advanced material, combining multispectral stealth with sensing capabilities, holds immense potential for applications ranging from camouflage technology to smart wearables.

show abstract

Oxygen vacancy-dependent microstructural, optical and magnetic properties of sol-gel Tb0.2 Er1 Y2.8 Fe5 O12 films

Cited by 22 publications

References 48 publications

Cr-Containing Rare-Earth Substituted Yttrium Iron Garnet Ferrites: Catalytic Properties in the Ethylbenzene Oxidation

Cr-Containing Rare-Earth Substituted Yttrium Iron Garnet Ferrites: Catalytic Properties in the Ethylbenzene Oxidation

Properties of Magnetic Garnet Films for Flexible Magneto-Optical Indicators Fabricated by Spin-Coating Method

Coral‐Inspired Terahertz‐Infrared Bi‐Stealth Electronic Skin

Contact Info

Product

Resources

About