Iron-Oxide Magnetic Materials for Millimeter-Wave Absorption

2021 ◽  
Vol 30 (10) ◽  
pp. 16-21
Author(s):  
Youn-Kyoung BAEK ◽  
Jung-Goo LEE
Keyword(s):  
Electromagnetic Wave ◽  
Iron Oxide ◽  
Magnetic Materials ◽  
Millimeter Wave ◽  
High Performance ◽  
Wave Spectra ◽  
High Frequencies ◽  
Practical Applications ◽  
Absorbing Materials ◽  
Soft Ferrites

High-performance electromagnetic-wave absorbers are required for the control of millimeter-wave spectra, which will play a big role in future 5G and 6G wireless networks. Traditional absorbing materials comprised of metals or soft ferrites have been developed but their lack of ability to absorb at extremely high frequencies continues to hinder their practical applications. Thus, this article briefly introduces several iron-oxide magnetic materials with millimeter-wave absorbing capability.

Enhanced Electromagnetic Wave Absorption of Magnetic Co Nanoparticles/CNTs/EG Porous Composites with Waterproof, Flame-retardant and Thermal Management Functions

2021 ◽  
Author(s):  
Zhen Xiang ◽  
Xiaojie Zhu ◽  
Yanyan Dong ◽  
Xiang Zhang ◽  
Yuyang Shi ◽  
...  
Keyword(s):  
Electromagnetic Wave ◽  
Thermal Management ◽  
High Performance ◽  
Cobalt Nanoparticles ◽  
Absorbing Materials ◽  
Co Nanoparticles ◽  
Management Functions ◽  
Porous Composites ◽  
Tremendous Challenge ◽  
Widespread Interest

Multifunctional high-performance electromagnetic wave absorbing materials have aroused widespread interest, but they are still a tremendous challenge. Here, we demonstrated multifunctional electromagnetic absorbing characteristics of magnetic cobalt nanoparticles suspended in...

Magnetic Materials for New Sensors — Sensor Magnetics —

1991 ◽  
Vol 232 ◽  
Author(s):  
K. Mohri
Keyword(s):  
Magnetic Materials ◽  
High Performance ◽  
High Temperature Superconductors ◽  
High Sensitivity ◽  
High Level ◽  
New Sensors ◽  
And Control ◽  
Measurement And Control ◽  
New Magnetic Materials ◽  
Soft Ferrites

ABSTRACT”Magnetics sensors” are the key devices to establish intelligent electronics measurement and control systems for development of high level factory automations ( FA ). Various magnetics sensors having quick response, high sensitivity and robustness have been widely developed in these years using amorphous magnetic alloys, magnetoresistive ( MR ) elements, soft ferrites, and high temperature superconductors. These high-performance sensors are spreading in use in the fields of Power-Electronics ( Power Magnetics ), Mechatronics, Medical Electronics ( Medical Magnetics), Information Apparatus, Security Electronics ( Security Magnetics ) etc..Relations between new magnetic materials and high-performance sensors are summarized and a principle for constitution of these sensors is proposed.

Core/shell structured C/ZnO nanoparticles composites for effective electromagnetic wave absorption

RSC Advances ◽  
2016 ◽  
Vol 6 (8) ◽  
pp. 6467-6474 ◽  
Author(s):  
Meikang Han ◽  
Xiaowei Yin ◽  
Sa Ren ◽  
Wenyan Duan ◽  
Litong Zhang ◽  
...  
Keyword(s):  
Electromagnetic Wave ◽  
Zno Nanoparticles ◽  
High Performance ◽  
Impedance Match ◽  
Core Shell ◽  
Effective Strategy ◽  
Electromagnetic Wave Absorption ◽  
Wave Absorption ◽  
Microwave Absorbing Materials ◽  
Absorbing Materials

Core/shell structured C/ZnO nanoparticles composite exhibits an effective strategy to design high-performance microwave absorbing materials with adjustable impedance match.

Morphology-dependent electromagnetic wave absorbing properties of iron-based absorbers: one-dimensional, two-dimensional, and three-dimensional classification

2019 ◽  
Vol 87 (2) ◽  
pp. 20901 ◽  
Author(s):  
Zehao Zhao ◽  
Zirui Jia ◽  
Hongjing Wu ◽  
Zhenguo Gao ◽  
Yi Zhang ◽  
...  
Keyword(s):  
Electromagnetic Wave ◽  
Electromagnetic Interference ◽  
High Performance ◽  
Low Cost ◽  
Impedance Matching ◽  
Three Dimensional ◽  
Microwave Absorbing Materials ◽  
Dimensional Classification ◽  
Absorbing Materials ◽  
Microwave Absorbing

Owing to the fast development of wireless techniques at the high-frequency range, the electromagnetic interference problem has been of increasing significance and attracting global attention. It is urgent to develop efficient microwave absorbing materials to attenuate the harmful electromagnetic wave. Iron and Fe-based composites are advantageous in the low-cost and attractive magnetic properties, so they have been widely studied in microwave absorption. This review focuses on the latest advances in nanostructured Fe-based materials including nanostructured iron, Fe/C (carbon nanotubes, nanofibers, nanocapsules, etc.), Fe/semiconductor (TiO2, MnO2, ZnO, SiO2, MoS2, etc.), Fe/polymer (polyaniline and polypyrrole), FeCo alloy, etc. However, most of these Fe-based materials suffer from the poor impedance matching and oxidation, which seriously impede their implementation as high-performance microwave absorbing materials. In this review, the main synthesis and modification methods, as well as the practical performance of Fe-based microwave absorbing materials are discussed. Moreover, challenges and perspectives of Fe-based composites for further development in microwave absorbing materials are proposed.

Fabrication of cobalt gallium oxide with zinc iron oxide on nickel foam for a high-performance asymmetric supercapacitor

2019 ◽  
Vol 43 (11) ◽  
pp. 4590-4598 ◽  
Author(s):  
Akbar Mohammadi Zardkhoshoui ◽  
Saied Saeed Hosseiny Davarani ◽  
Masumeh Hashemi
Keyword(s):  
Iron Oxide ◽  
Gallium Oxide ◽  
High Performance ◽  
Nickel Foam ◽  
Asymmetric Supercapacitor ◽  
Asymmetric Supercapacitors ◽  
Practical Applications ◽  
Straightforward Method

A straightforward method is proposed for the synthesis of CoGa2O4 on nickel foam with excellent durability for practical applications in asymmetric supercapacitors.

scholarly journals Flux Method Growth of Large Size Group IV–V 2D GeP Single Crystals and Photoresponse Application

Crystals ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 235
Author(s):  
Shuqi Zhao ◽  
Tongtong Yu ◽  
Ziming Wang ◽  
Shilei Wang ◽  
Limei Wei ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Single Crystals ◽  
High Performance ◽  
Group Iv ◽  
X Ray Diffraction ◽  
High Quality ◽  
Practical Applications ◽  
Large Size ◽  
Growth Method ◽  
Polarized Raman

Two-dimensional (2D) materials driven by their unique electronic and optoelectronic properties have opened up possibilities for their various applications. The large and high-quality single crystals are essential to fabricate high-performance 2D devices for practical applications. Herein, IV-V 2D GeP single crystals with high-quality and large size of 20 × 15 × 5 mm3 were successfully grown by the Bi flux growth method. The crystalline quality of GeP was confirmed by high-resolution X-ray diffraction (HRXRD), Laue diffraction, electron probe microanalysis (EPMA) and Raman spectroscopy. Additionally, intrinsic anisotropic optical properties were investigated by angle-resolved polarized Raman spectroscopy (ARPRS) and transmission spectra in detail. Furthermore, we fabricated high-performance photodetectors based on GeP, presenting a relatively large photocurrent over 3 mA. More generally, our results will significantly contribute the GeP crystal to the wide optoelectronic applications.

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