Special Issue "Advanced Magnetic Nanocomposites: Structural, Physical Properties and Application"

A special issue of Nanomaterials (ISSN 2079-4991).

Deadline for manuscript submissions: 31 December 2020.

Special Issue Editor

Dr. Raghvendra Singh Yadav
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Guest Editor
Centre of Polymer Systems, Tomas Bata University in Zlin, Trida Tomase Bati 5678, 76001 Zlin, Czech Republic
Interests: magnetic materials; dielectric materials; electrical properties; luminescent nanomaterials; microwave absorbing materials; ceramics; materials chemistry; soft matter; nanostructured materials; materials for energy; semiconductor materials; nano–bio composite materials; metals and alloys; nanocomposites; functional materials; optical materials; graphene; polymer nanocomposites; graphene nanocomposites; graphene quantum dots; nanoparticles; nanocomposites; structural properties; magnetic properties; dielectric properties; electrical properties; magnetically recoverable efficient photo-catalysts; data storage; gas sensing; magnetoresistance; other physical properties; synthesis; characterization; hyperthermia cancer treatment; drug delivery; magnetic resonance imaging (MRI) contrast agents; magnetic refrigeration (MR); spintronic devices; ferrofluids; anode materials for Li-ion batteries; microwave devices; water splitting for hydrogen production; paint industry; supercapacitors; electromagnetic interference shielding or microwave absorbers; solar cells
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Special Issue Information

Dear Colleagues,

Recently, magnetic nanoparticles and nanocomposites have established an extensive attention among the scientists and academicians due to its technological applications such as hyperthermia cancer treatment, drug-delivery, magnetic resonance imaging (MRI) contrast agent, magnetic refrigeration (MR), spintronic devices, magnetic recording media with higher storage density, magnetically recoverable efficient photo-catalyst, gas sensor, ferro-fluids, anode material for Li-ion battery, microwave devices, water splitting for hydrogen production, paint industry, super-capacitors, and electromagnetic interference shielding or microwave absorber, etc. For technological application, the performance of magnetic nanoparticles and nanocomposites can be regulated by its structural properties. A controllable synthesis/preparation technique can provide desired physical properties for specific application.

This special issue of Nanomaterials ‘‘Advanced Magnetic Nanocomposites: Structural, Physical Properties and Application’’ aims at receiving articles on recent development on advanced magnetic nanoparticles and nanocomposites with detailed explanation of structural, physical characteristics and further possible potential application. This special issue also focusses the synthesis/preparation and characterization of various type of magnetic nanoparticles and nanocomposites in the form of academic articles, letters, reviews and communications.  I kindly invite you for a contribution to this Special Issue of Nanomaterials ‘‘Advanced Magnetic Nanocomposites: Structural, Physical Properties and Application’’.

Dr. Raghvendra Singh Yadav
Guest Editor

Manuscript Submission Information

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Keywords

  • Magnetic Nanoparticles
  • Magnetic Nanostructures
  • Magnetic Nanocomposites
  • Multifunctional Magnetic Nanocomposites
  • Synthesis and Characterization
  • Properties
  • Applications  

Published Papers (2 papers)

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Research

Open AccessArticle
Magnetic, Electrical, and Mechanical Behavior of Fe-Al-MWCNT and Fe-Co-Al-MWCNT Magnetic Hybrid Nanocomposites Fabricated by Spark Plasma Sintering
Nanomaterials 2020, 10(3), 436; https://doi.org/10.3390/nano10030436 - 29 Feb 2020
Abstract
This paper aims to investigate different properties of the Fe-Al matrix reinforced with multi-walled carbon nanotube (MWCNT) nanocomposites with the Al volume content up to 65%, according to the Fe-Al combination. In addition, the effect of adding Co content on the improvement of [...] Read more.
This paper aims to investigate different properties of the Fe-Al matrix reinforced with multi-walled carbon nanotube (MWCNT) nanocomposites with the Al volume content up to 65%, according to the Fe-Al combination. In addition, the effect of adding Co content on the improvement of the soft magnetic properties of the nanocomposites was carried out. The nanocomposites were fabricated using the powder metallurgy process. The iron-aluminum metal matrix reinforced multi-walled carbon nanotube (Fe-Al-MWCNT) nanocomposites showed a continuous increase of saturation magnetization from 90.70 A·m2/kg to 167.22 A·m2/kg and microhardness, whereas the electrical resistivity dropped as the Al content increased. The incorporation of Co nanoparticles in Fe-Al-MWCNT up to 35 vol% of Co considerably improved the soft magnetic properties of the nanocomposites by reducing the coercivity and retentivity up to 42% and 47%, respectively. The results showed that Al-based magnetic nanocomposites with a high Al volume content can be tailored using ferromagnetic particles. The composites with a volume content of magnetic particles (Fe+Co) greater than 60 vol% exhibited higher saturation magnetization, higher coercivity, and higher retentivity than the standard Sendust core. Moreover, the produced composites can be used for the lightweight magnetic core in electromagnetic devices due to their low density and good magnetic and mechanical properties. Full article
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Open AccessArticle
An Ab Initio Study of Magnetism in Disordered Fe-Al Alloys with Thermal Antiphase Boundaries
Nanomaterials 2020, 10(1), 44; https://doi.org/10.3390/nano10010044 - 23 Dec 2019
Abstract
We have performed a quantum-mechanical study of a B2 phase of Fe 70 Al 30 alloy with and without antiphase boundaries (APBs) with the {001} crystallographic orientation of APB interfaces. We used a supercell approach with the atoms distributed according to the special [...] Read more.
We have performed a quantum-mechanical study of a B2 phase of Fe 70 Al 30 alloy with and without antiphase boundaries (APBs) with the {001} crystallographic orientation of APB interfaces. We used a supercell approach with the atoms distributed according to the special quasi-random structure (SQS) concept. Our study was motivated by experimental findings by Murakami et al. (Nature Comm. 5 (2014) 4133) who reported significantly higher magnetic flux density from A2-phase interlayers at the thermally-induced APBs in Fe 70 Al 30 and suggested that the ferromagnetism is stabilized by the disorder in the A2 phase. Our computational study of sharp APBs (without any A2-phase interlayer) indicates that they have moderate APB energies (≈0.1 J/m 2 ) and cannot explain the experimentally detected increase in the ferromagnetism because they often induce a ferro-to-ferrimagnetic transition. When studying thermal APBs, we introduce a few atomic layers of A2 phase of Fe 70 Al 30 into the interface of sharp APBs. The averaged computed magnetic moment of Fe atoms in the whole B2/A2 nanocomposite is then increased by 11.5% w.r.t. the B2 phase. The A2 phase itself (treated separately as a bulk) has the total magnetic moment even higher, by 17.5%, and this increase also applies if the A2 phase at APBs is sufficiently thick (the experimental value is 2–3 nm). We link the changes in the magnetism to the facts that (i) the Al atoms in the first nearest neighbor (1NN) shell of Fe atoms nonlinearly reduce their magnetic moments and (ii) there are on average less Al atoms in the 1NN shell of Fe atoms in the A2 phase. These effects synergically combine with the influence of APBs which provide local atomic configurations not existing in an APB-free bulk. The identified mechanism of increasing the magnetic properties by introducing APBs with disordered phases can be used as a designing principle when developing new magnetic materials. Full article
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