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Nanomaterials
Special Issues
Synthesis and Properties of Nanocrystalline Magnetic Materials
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Special Issue "Synthesis and Properties of Nanocrystalline Magnetic Materials"

A special issue of Nanomaterials (ISSN 2079-4991). This special issue belongs to the section "Synthesis, Interfaces and Nanostructures".

Deadline for manuscript submissions: 31 May 2021.

Special Issue Editor

Dr. Chul-Jin Choi
Website
Guest Editor
Principa researcher in Functional Nanopowders Materials Department, Korea Institute of Materials Science, Changwon 51508, R. Korea
Interests: magnetic nanoparticles; nanocrystals; rare-earth-free magnet; nanocapsules; shell/core structure

Special Issue Information

Dear Colleagues,

Nanocrystalline magnetic materials have attracted a great deal of attention for several decades due to their unique size-dependent physical properties. Nanoparticles with unique magnetic properties can be synthesized by a number of methods and be used in many fields. Nanocapsules with a shell/core structure have also been studied extensively. The control of nanostructures is crucial for obtaining high-performance magnetic materials. Magnetic heterostructures are important for developing electric devices. A number of thin films and nanowires with various properties have also been reported.

This Special Issue of Nanomaterials will attempt to cover the recent advancements in nanocrystalline magnetic materials, including but not limited to nanoparticles, nanocapsules, nanocrystalline bulk magnetic materials, nanowires, thin films, etc.

Dr. Chul-Jin Choi
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All papers will be peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Nanomaterials is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2200 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • nanocrystalline/nanocrystals bulk magnetic materials
  • magnetic nanoparticles
  • nanocapsules
  • shell/core structure
  • magnetic heterostructures
  • nanowires
  • thin films

Published Papers (1 paper)

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Open AccessEditor’s ChoiceArticle
Effects of Mg and Sb Substitution on the Magnetic Properties of Magnetic Field Annealed MnBi Alloys
by
Hui-Dong Qian
,
Yang Yang
,
Jung Tae Lim
,
Jong-Woo Kim
,
Chul-Jin Choi
and
Jihoon Park
Nanomaterials 2020, 10(11), 2265; https://doi.org/10.3390/nano10112265 - 16 Nov 2020
Abstract
Rare-earth-free permanent magnets have attracted considerable attention due to their favorable properties and applicability for cost-effective, high-efficiency, and sustainable energy devices. However, the magnetic field annealing process, which enhances the performance of permanent magnets, needs to be optimized for different magnetic fields and [...] Read more.
Rare-earth-free permanent magnets have attracted considerable attention due to their favorable properties and applicability for cost-effective, high-efficiency, and sustainable energy devices. However, the magnetic field annealing process, which enhances the performance of permanent magnets, needs to be optimized for different magnetic fields and phases. Therefore, we investigated the effect of composition on the crystallization of amorphous MnBi to the ferromagnetic low-temperature phase (LTP). The optimal compositions and conditions were applied to magnetic field annealing under 2.5 T for elemental Mg- and Sb/Mg pair-substituted MnBi. The optimum MnBi composition for the highest purity LTP was determined to be Mn56Bi44, and its maximum energy product, (BH)max, was 5.62 MGOe. The Mg-substituted MnBi exhibited enhanced squareness (Mr/Ms), coercivity (Hc), and (BH)max values up to 0.8, 9659 Oe, and 5.64 MGOe, respectively, whereas the same values for the Sb/Mg pair-substituted MnBi were 0.76, 7038 Oe, and 5.60 MGOe, respectively. The substitution effects were also investigated using first-principles calculations. The density of states and total magnetic moments of Mn16Bi15Mg and Mn16Bi15Sb were similar to those of pure Mn16Bi16. Conversely, the Sb-substituted MnBi resulted in a dramatic enhancement in the anisotropy constant (K) from a small negative value (−0.85 MJ/m3) to a large positive value (6.042 MJ/m3). Full article
(This article belongs to the Special Issue Synthesis and Properties of Nanocrystalline Magnetic Materials)
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