On the structural and magnetic properties of SbxY3-xFe5O12 nanostructures synthesized by bottom-up and top-down methods

Pormehr, Asma; Niyaifar, M.; Hasanpour, Ahmad; Kheirdoust, Hajar; Elansary, M.; Niazi, Hamid

doi:10.1016/j.jallcom.2022.165834

Cited by 5 publications

(2 citation statements)

References 89 publications

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“…However, this method has high requirements on process equipment and operating environment, and the cost is expensive. Compared with the top-down method, the bottom-up method is a relatively large and complex structural system formed by self-assembly of smaller structural units through weak interaction [25][26][27]. This method does not depend on precise equipment and has low cost, but it is difficult to achieve strict control of size and morphology.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Deposition and Etching of Quasi-Two-Dimensional Periodic Membrane Structure

Yao,

Xu,

Lou

et al. 2024

Molecules

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In this paper, two experimental procedures are reported, namely electro-deposition in the ultrathin liquid layer and chemical micro-etching. Firstly, a large area quasi-two-dimensional periodic membrane with adjustable density is deposited on a Si substrate driven by half-sinusoidal voltage, which is composed of raised ridges and a membrane between the ridges. The smaller the voltage frequency is, the larger the ridge distance is. The height of a raised ridge changes synchronously with the amplitude. The grain density distribution of membrane and raised ridge is uneven; the two structures change alternately, which is closely related to the change of growth voltage and copper ion concentration during deposition. The structural characteristics of membrane provide favorable conditions for micro-etching; stable etching speed and microscope real-time monitoring are the keys to achieve accurate etching. In the chemical micro-etching process, the membrane between ridges is removed, retaining the raised ridges, thus a large scale ordered micro-nano wires array with lateral growth was obtained. This method is simple and controllable, can be applied to a variety of substrates, and is the best choice for designing and preparing new functional materials. This experiment provides a basis for the extension of this method.

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Section: Introductionmentioning

confidence: 99%

Electrochemical Deposition and Etching of Quasi-Two-Dimensional Periodic Membrane Structure

Yao,

Xu,

Lou

et al. 2024

Molecules

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“…At present, in addition to using a YIG single crystal with excellent performance, ion substitution has been used to improve the high-frequency dielectric properties of YIG. − Rare earth doping could regulate the interaction between a lattice with phonon, spin, and orbital through the structural distortion (expansion or contraction), and thus, the magnetic and dielectric properties of materials are modified. − However, the method to improve the dielectric constant by doping rare earth ions is often accompanied by the increase of dielectric loss, which is also a disadvantage of traditional doping methods. High dielectric constant and low dielectric loss are also contradictory in many other material systems. , Besides the intrinsic polarization behavior, the factors that affected the dielectric constant, such as grain size, film thickness, lattice structure, and space charge, would all affect the polarization behavior of materials .…”

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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Structural distortion induced enhancement of magnetic and dielectric properties in Pr modified yttrium iron garnet films

Jiao

Chen²,

Tian³

et al. 2023

Ceramics International

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On the structural and magnetic properties of SbxY3-xFe5O12 nanostructures synthesized by bottom-up and top-down methods

Cited by 5 publications

References 89 publications

Electrochemical Deposition and Etching of Quasi-Two-Dimensional Periodic Membrane Structure

Electrochemical Deposition and Etching of Quasi-Two-Dimensional Periodic Membrane Structure

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

Structural distortion induced enhancement of magnetic and dielectric properties in Pr modified yttrium iron garnet films

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