Investigation of substitution effects of the first four lanthanides (La, Ce, Pr and Nd) in yttrium iron garnet

Norkus, Mantas; Laurikenas, Andrius; Vistorskaja, Diana; Mažeika, Kęstutis; Baltrūnas, D.; Skaudžius, Ramūnas; Beganskienė, Aldona; Kareiva, Aivaras

doi:10.1016/j.jallcom.2022.163978

Cited by 7 publications

(3 citation statements)

References 53 publications

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“…In addition, the introduction of magnetic function into the traditional microwave devices has gradually become a new trend to achieve the multifunction of electronic components, and high saturation magnetization and high dielectric constant are conducive to bring about miniaturization for the system . Yttrium iron garnet Y 3 Fe 5 O 12 (YIG), − as a traditional microwave ferrite material, is an indispensable material for designing microwave devices due to the advantages of high Curie temperature, high resistivity, and low microwave loss, but its dielectric constant and saturation magnetization are still relatively low. Because dielectric constant and dielectric loss are usually a pair of trade-off parameters, it is often difficult for traditional modification methods (such as ion doping and preparation of composite materials) to achieve the application goal of high dielectric constant and low loss at the same time.…”

Section: Introductionmentioning

confidence: 99%

Designing a Periodic Structure with a Composition Gradient Stack Unit to Realize a Good Comprehensive Dielectric Property of Yttrium Iron Garnet Multilayer Film

Jiao,

You,

Tian

et al. 2023

ACS Appl. Mater. Interfaces

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Y3Fe5O12 (YIG) thin films are highly needed in microwave devices, but the low saturation magnetization and low dielectric constant greatly limit the application of YIG thin films. It was reported that the ion substitution, for example, Pr3+, could increase the dielectric constant of Y3‑x Pr x Fe5O12 (YPr x IG). Unfortunately, the dielectric loss would also be significantly increased. In this work, [YPr0.20IG/YPr0.15IG/YPr0.10IG] N multilayer films were fabricated via the chemical solution deposition method, by designing a periodic structure with the [YPr0.20IG/YPr0.15IG/YPr0.10IG] composition gradient stack. In comparison to the average composition of YPr0.15IG, high saturation magnetization, high dielectric constant, and low loss were successfully simultaneously achieved in the multilayer structure. The N = 6 film exhibited a higher saturation magnetization of 252.8 emu/cm3 than the value (213.1) of the YPr0.15IG (average composition) film. The dielectric constant of the N = 6 film reached 25.6 in contrast to the value of 18.3 for the YPr0.15IG film at 12.4 GHz, which was the contribution of the rapid flip of the electric dipole of a single-unit dielectric material and the accumulation of interface charge. Furthermore, the dielectric loss of the film with N = 6 decreased to 0.0036 compared with the value (0.0102) of the average composition film. This work demonstrated a strategy of designing a periodic structure with a composition gradient stack unit to realize a good comprehensive dielectric property through taking advantage of the multiple effects of “coherent growth, component matching, and interface accumulation”.

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Section: Introductionmentioning

confidence: 99%

Designing a Periodic Structure with a Composition Gradient Stack Unit to Realize a Good Comprehensive Dielectric Property of Yttrium Iron Garnet Multilayer Film

Jiao,

You,

Tian

et al. 2023

ACS Appl. Mater. Interfaces

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“…Since garnets are thought to be modified by various synthetic routes to improve their physicochemical properties, yttrium iron garnet (YIG) ferrite structures have become the focus of a wide range of applications [1][2][3]. With numerous potential advantages, such as good chemical stability of the rigid framework, facile tuning of composition, and controllable morphology and texture, the modified garnets can be applied as efficient catalysts, comparative to their conventional bulk and nanostructured iron oxide counterparts [2][3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

“…As these cations have similar ionic radii, e.g., Y 3+ (0.96 Å) and Er 3+ (0.95 Å), it is expected that there is no drastic change due to cation substitution in the structure of YIG garnets. On the contrary, partial substitution of Y 3+ cations in the YIG garnet by trivalent or divalent ions, i.e., Fe 3+ (0.65 Å), Cr 3+ (0.62 Å), Mo 3+ (0.69 Å) and Al 3+ (0.53 Å) or Zn 2+ (0.74 Å), ultimately results in structural distortions and high internal stresses of the lattices [1,5,13]. Such a variety of compositions also makes it possible for the garnet to act as an acid-base or redox catalyst, and its Er effects on oxidation catalysts are especially well documented [5,13].…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2022

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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.

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Catalytic properties of Cu-substituted LaMn1-yCuyO3 on styrene combustion

Shen

Zhang

et al. 2023

Reac Kinet Mech Cat

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Investigation of substitution effects of the first four lanthanides (La, Ce, Pr and Nd) in yttrium iron garnet

Cited by 7 publications

References 53 publications

Designing a Periodic Structure with a Composition Gradient Stack Unit to Realize a Good Comprehensive Dielectric Property of Yttrium Iron Garnet Multilayer Film

Designing a Periodic Structure with a Composition Gradient Stack Unit to Realize a Good Comprehensive Dielectric Property of Yttrium Iron Garnet Multilayer Film

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

Catalytic properties of Cu-substituted LaMn1-yCuyO3 on styrene combustion

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