Remarkable GHz electromagnetic wave absorption mediated by synergistic interplay of magnetic/dielectric loss and impedance matching

IF 4.6 2区 物理与天体物理 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY
Mangui Han
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引用次数: 0

Abstract

The fabrication of partially crystallized Fe-Cu-Nb-Si-B nanocrystalline flakes with pronounced shape anisotropy has been reported. The size distributions of both the average grain size and flake particles were found to conform to lognormal distributions. Inhomogeneous nanostructures and microstructures were revealed, which significantly impact the broadening of permeability spectra and the local coercivity values. The microwave magnetic losses were observed to be more pronounced than the microwave dielectric losses. The outstanding GHz − band electromagnetic wave absorption performance can be adequately explained by considering impedance matching, which is attributed to their unique two − phase ferromagnetic nanostructures. The first − order reversal curves (FORC) technique was utilized to uncover the inhomogeneous nanostructures and to clarify the origins of microwave magnetic losses.
磁/介电损耗和阻抗匹配协同作用介导的显著GHz电磁波吸收
本文报道了部分结晶的Fe-Cu-Nb-Si-B纳米晶片的制备,其形状具有明显的各向异性。平均晶粒尺寸和片状颗粒的尺寸分布均符合对数正态分布。非均匀的纳米结构和微观结构显著影响了磁导率谱的展宽和局部矫顽力值。微波磁损耗比微波介电损耗更明显。考虑阻抗匹配可以充分解释其出色的GHz波段电磁波吸收性能,这归因于其独特的两相铁磁纳米结构。利用一阶反转曲线(FORC)技术揭示了非均匀纳米结构,并阐明了微波磁损耗的来源。
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来源期刊
Results in Physics
Results in Physics MATERIALS SCIENCE, MULTIDISCIPLINARYPHYSIC-PHYSICS, MULTIDISCIPLINARY
CiteScore
8.70
自引率
9.40%
发文量
754
审稿时长
50 days
期刊介绍: Results in Physics is an open access journal offering authors the opportunity to publish in all fundamental and interdisciplinary areas of physics, materials science, and applied physics. Papers of a theoretical, computational, and experimental nature are all welcome. Results in Physics accepts papers that are scientifically sound, technically correct and provide valuable new knowledge to the physics community. Topics such as three-dimensional flow and magnetohydrodynamics are not within the scope of Results in Physics. Results in Physics welcomes three types of papers: 1. Full research papers 2. Microarticles: very short papers, no longer than two pages. They may consist of a single, but well-described piece of information, such as: - Data and/or a plot plus a description - Description of a new method or instrumentation - Negative results - Concept or design study 3. Letters to the Editor: Letters discussing a recent article published in Results in Physics are welcome. These are objective, constructive, or educational critiques of papers published in Results in Physics. Accepted letters will be sent to the author of the original paper for a response. Each letter and response is published together. Letters should be received within 8 weeks of the article''s publication. They should not exceed 750 words of text and 10 references.
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