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Magnetochemistry
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Advanced Nanomagnetic Material
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Advanced Nanomagnetic Material

A special issue of Magnetochemistry (ISSN 2312-7481). This special issue belongs to the section "Magnetic Materials".

Deadline for manuscript submissions: closed (31 October 2022) | Viewed by 4361

Special Issue Editors

Dr. Bhaskar Das

E-Mail Website
Guest Editor
Department: Chemical Engineering and Materials Science, University of Minnesota Twin Cities, Minneapolis, MN 55455, USA
Interests: magnetism; recording physics; spintronics
Special Issues, Collections and Topics in MDPI journals
Dr. Renu Choudhary

E-Mail Website
Guest Editor
Ames Laboratory, Iowa State University, Ames, IA 50011, USA
Interests: magnetism; density functional theory; nanoscale physics

Special Issue Information

Dear Colleagues,

The demand for new or improved magnetic materials has increased in recent years in light of emerging technologies such as climate-friendly electric vehicles and wind energy or recording media needed to store ever-increasing data. This motivates magnetics research to identify new approaches to determining the potential of novel magnetic materials or optimizing the performance of existing materials to suit the needs.

Nanostructuring emerged as a solution to this problem as it helps to realize the unprecedented potential of magnetic materials for various applications, starting from nanocomposite permanent magnets to nanoscale magnetic materials for spintronics applications such as magnetic recording and data storage. This Special Issue is focused on this aspect where nanoscale magnetism helps to understand fundamental physics and also to develop new magnetic applications. Specifically, the strength of this issue will be the discussion of novel magnetic properties or novel engineering approaches which can only be obtained via nanostructuring of magnetic materials.

Dr. Bhaskar Das
Dr. Renu Choudhary
Guest Editors

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 submissions that pass pre-check are 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. Magnetochemistry 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 2700 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

  • nanomagnetism
  • spintronics
  • magnetic recording
  • nanostructuring
  • novel magnets

Published Papers (2 papers)

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Research

14 pages, 4590 KiB  
Article
Evidence of Hysteresis Free Ferromagnetic Nature and Significant Magnetocaloric Parameters in FeNi Binary Alloy
by Mohit K. Sharma, Akshay Kumar, Kavita Kumari, Su-Jeong Park, Naveen Yadav, Seok-Hwan Huh and Bon-Heun Koo
Magnetochemistry 2023, 9(1), 8; https://doi.org/10.3390/magnetochemistry9010008 - 26 Dec 2022
Cited by 5 | Viewed by 2288
Abstract
In this study, our aim is to investigate the structural, magnetic, and magnetocaloric properties of the FeNi binary alloy. The FeNi alloy with Fe65Ni35 composition was prepared by ball milling followed by the annealing and quenching processes. A Rietveld refinement [...] Read more.
In this study, our aim is to investigate the structural, magnetic, and magnetocaloric properties of the FeNi binary alloy. The FeNi alloy with Fe65Ni35 composition was prepared by ball milling followed by the annealing and quenching processes. A Rietveld refinement analysis of structural results reveals that this system has coexisting cubic structural phases with a dominant face-centered cubic phase (Fm-3m;γ-FeNi). Magnetization results of this compound indicate the presence of ferromagnetic ordering and the magnetic transition observed around 100 K. Moreover, an Arrott plot study provides information about the order of phase transition, which is found in the second-order near the ordering temperature, whereas first-order nature is also noted in the low-temperature region. The significant magnetocaloric parameters, i.e., magnetic entropy change (ΔSM~0.495 J/kg-K) and relative cooling power (88 J/kg), are noted over a wide temperature range. The power law dependency of magnetic entropy change with the applied field is also investigated. Due to their significant magnetocaloric performance over a wide temperature range, these multiphase alloys may be a good candidate for room-temperature to low-temperature magnetic refrigeration. Full article
(This article belongs to the Special Issue Advanced Nanomagnetic Material)
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9 pages, 1844 KiB  
Article
Structural, Microstructural and Magnetic Properties of SmCo5/20wt%Fe Magnetic Nanocomposites Produced by Mechanical Milling in the Presence of CaO
by Razvan Hirian, Rares Adrian Bortnic, Florin Popa, Gabriela Souca, Olivier Isnard and Viorel Pop
Magnetochemistry 2022, 8(10), 124; https://doi.org/10.3390/magnetochemistry8100124 - 11 Oct 2022
Cited by 1 | Viewed by 1060
Abstract
In this work, we demonstrate the possibility of using a soluble ceramic material, 5 wt% CaO, as an additive for an SmCo5/20wt%Fe exchange-coupled nanocomposite obtained by mechanical milling in order to inhibit the grain growth of the soft magnetic phase during [...] Read more.
In this work, we demonstrate the possibility of using a soluble ceramic material, 5 wt% CaO, as an additive for an SmCo5/20wt%Fe exchange-coupled nanocomposite obtained by mechanical milling in order to inhibit the grain growth of the soft magnetic phase during annealing, which results in a more stable microstructure and an implicit improvement in the hard–soft interphase exchange coupling. Moreover, we show that the additive improves the phase stability of the composite material, reducing the amount of Sm2Co17-type phases formed during the synthesis process, an important aspect because Sm2Co17 is detrimental to the magnetic performance of the SmCo5/20%Fe nanocomposite. These effects are reflected in a nearly 13% increase in the coercive field (Hc) and a 20% increase in the energy product, (BH)max, for the powders produced using CaO as compared to pure SmCo5/20%Fe nanocomposites processed in the same manner. Full article
(This article belongs to the Special Issue Advanced Nanomagnetic Material)
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