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Advances in Magnetic Materials and Applications
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Advances in Magnetic Materials and Applications

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Materials Physics".

Deadline for manuscript submissions: 20 May 2026 | Viewed by 1348

Special Issue Editor

Dr. Serkan Caliskan

E-Mail Website
Guest Editor
Department of Physical and Applied Sciences, College of Science & Engineering, University of Houston-Clear Lake, Houston, TX 77058, USA
Interests: modeling of nanomaterials; magnetic materials; spin-polarized transport; surface characteristics
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The Special Issue “Advances in Magnetic Materials and Applications” aims to exhibit the latest studies and developments in the design, synthesis, characterization, and application of magnetic materials across diverse fields. Magnetic materials play a crucial role in science and engineering, with applications ranging from data storage, spintronics, and sensing technologies to energy conversion and biomedical devices. This Special Issue seeks to bring together contributions that address both fundamental aspects (such as magnetic structure, exchange interactions, and magneto-transport phenomena) and applied innovations that can be harnessed for potential functional devices. Topics of interest include but are not limited to the following: soft and hard magnetic materials, magnetic nanostructures, multifunctional and composite magnets, magnetic semiconductors, and hybrid systems. Emphasis is also placed on emerging fabrication techniques, advanced characterization methods, theoretical modeling, and simulations that enhance the identification of magnetism at scales of different lengths. Through integrating experimental, computational, and application-driven perspectives, this Special Issue will serve as a platform for scientists to share innovations, identify challenges, and inspire future directions in magnetic materials science, which will pave the way towards new technologies.

Dr. Serkan Caliskan
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 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 250 words) can be sent to the Editorial Office for assessment.

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. Materials is an international peer-reviewed open access semimonthly 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 2600 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

  • magnetic materials
  • spintronics
  • magnetic properties
  • magnetic devices
  • hard and soft magnets

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Published Papers (3 papers)

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Research

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15 pages, 3838 KB  
Article
Improvement of Mechanical Properties and Electrical Resistivity in Giant Magnetostrictive Tb-Dy-Fe Alloy via Co-Addition of Al and Si Elements
by Qianhao Zhu, Jiawang Cheng, Jiheng Li, Xing Mu, Xiaoqian Bao, Jie Zhu and Xuexu Gao
Materials 2026, 19(1), 154; https://doi.org/10.3390/ma19010154 - 1 Jan 2026
Viewed by 342
Abstract
Giant magnetostrictive Tb-Dy-Fe alloys are extensively applied in transducers, actuators, and smart sensors owing to their exceptional magnetostrictive response. Nevertheless, in addition to the fracture failure caused by the inherent brittleness of the Laves intermetallic compound, Tb-Dy-Fe alloys also suffer from severe eddy [...] Read more.
Giant magnetostrictive Tb-Dy-Fe alloys are extensively applied in transducers, actuators, and smart sensors owing to their exceptional magnetostrictive response. Nevertheless, in addition to the fracture failure caused by the inherent brittleness of the Laves intermetallic compound, Tb-Dy-Fe alloys also suffer from severe eddy current losses due to low electrical resistivity, both of which limit the practical application of Tb-Dy-Fe alloys. To further enhance the overall performance of Tb-Dy-Fe alloys and expand their application scope, it has become essential to develop materials that exhibit high magnetostrictive properties, high electrical resistivity and excellent mechanical properties simultaneously. In this work, the effects of Al and Si co-addition on the microstructure and multifunctional properties of directionally solidified Tb0.27Dy0.73(Fe0.9Al0.075Si0.025)1.95 (hereafter TDF-AlSi) alloy were systematically investigated. Microstructural characterization revealed that Al partially substitutes Fe atoms in the matrix phase while promoting Al(Tb,Dy)Fe2 nanocluster, whereas Si preferentially segregated to grain boundary regions forming Tb2Si3 and TbSi1.75 phases. The bending strength of TDF-AlSi alloy was improved from 43 MPa to 65 MPa, an increase of 51.2%, which was attributed to solid solution strengthening by Al and grain boundary reinforcement by Si-rich precipitates. Meanwhile TDF-AlSi alloy exhibits a 2.4 times increase in electrical resistivity (1.619 μΩ·m), resulting in a 49% reduction of total loss at 1000 Hz. The enhancement of electrical resistivity mainly originated from the lattice distortion induced electron scattering by Al substitution and electron impedance at grain boundaries via silicide precipitation. Accompanied by enhancement of mechanical property and electrical resistivity, TDF-AlSi alloy maintained a high magnetostriction strain of 1212 ppm (200 kA/m, 10 MPa pre-compressive stress). The findings of the present study offer valuable theoretical and experimental insights with regard to the optimization of the performance of magnetostrictive Tb-Dy-Fe alloys. Full article
(This article belongs to the Special Issue Advances in Magnetic Materials and Applications)
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16 pages, 4760 KB  
Article
A Rapid Consolidation Route for Recycled NdFeB Powders and the Role of Particle Shape in Grain Growth
by Fabian Burkhardt, Alba Berja, Laura Grau, Matija Kreča, Lindrit Krasniqi, Benjamin Podmiljšak, Kristina Žužek, Carlo Burkhardt, Spomenka Kobe, Adrián Quesada and Tomaž Tomše
Materials 2025, 18(21), 5029; https://doi.org/10.3390/ma18215029 - 4 Nov 2025
Cited by 1 | Viewed by 789
Abstract
The recycling of NdFeB magnets is essential to reduce reliance on critical rare earth elements and mitigate the environmental burden of virgin magnet production. Hydrogen Processing of Magnetic Scrap (HPMS) offers an efficient method to extract magnet powders from end-of-life (EOL) products, yet [...] Read more.
The recycling of NdFeB magnets is essential to reduce reliance on critical rare earth elements and mitigate the environmental burden of virgin magnet production. Hydrogen Processing of Magnetic Scrap (HPMS) offers an efficient method to extract magnet powders from end-of-life (EOL) products, yet oxidation and microstructural degradation during powder preparation limit the magnetic performance of recycled magnets. In this work, rapid Radiation-Assisted Sintering (RAS) was systematically evaluated for the first time as a consolidation route for HPMS-derived powders. Magnets prepared via RAS exhibited performance comparable to those obtained by conventional sintering. When oxygen uptake during milling was prevented, the addition of 1 wt.% NdH3 to the already oxygen-burdened recycled powder improved the intrinsic coercivity and squareness of the demagnetization curve. The best-performing samples achieved Br = 1.18 T, (BH)max = 263 kJ/m3, and Hci = 742 kA/m at 100 °C, surpassing the properties of the original EOL magnets. Furthermore, the study revealed that, when the HPMS powder fragments preferentially break along grain boundaries, the resulting near-equilibrium powder particles exhibit limited growth, thereby restraining grain coarsening. These findings highlight the strong potential of RAS for more energy-efficient magnet-to-magnet recycling and provide new insight into optimizing HPMS powder processing to achieve enhanced magnetic performance. Full article
(This article belongs to the Special Issue Advances in Magnetic Materials and Applications)
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Review

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34 pages, 2200 KB  
Review
A Review on Sustainable Recycling of NdFeB Waste: Methodologies, Challenges, and the Integration of Machine Learning (ML)
by Rehan Ullah, Jason Daza, Asma Wederni, Lluisa Escoda, Joan Saurina and Joan-Josep Suñol
Materials 2026, 19(3), 594; https://doi.org/10.3390/ma19030594 - 3 Feb 2026
Abstract
The increasing demand and production of neodymium-iron-boron-based permanent magnets (NdFeB-PMs) for the electronics, energy sector, and automobile industries led to disposal consequences. The NdFeB-PMs contain a substantial amount of rare earth elements (REEs). Although China is the largest exporter of REEs to the [...] Read more.
The increasing demand and production of neodymium-iron-boron-based permanent magnets (NdFeB-PMs) for the electronics, energy sector, and automobile industries led to disposal consequences. The NdFeB-PMs contain a substantial amount of rare earth elements (REEs). Although China is the largest exporter of REEs to the world, it has applied some restrictive policies in terms of supply chain and taxes. To address such issues, this review systematically examines current recycling techniques, including short-loop, hydrometallurgy, pyrometallurgy, and hybrid processes, and the integration of Machine Learning (ML) to the leaching process, with a particular focus on their impact on industrial capability, economic viability, and environmental concerns. However, a comparative study highlights ongoing challenges to large-scale implementation, including fragmented waste sources, gaps between efficient processes and environmental sustainability, and a lack of regulatory and infrastructure support. To address these challenges, technical innovation in automated disassembly systems and selective REE recovery via ML was discussed, along with legislative initiatives such as Extended Producer Responsibility (EPR) and waste monitoring procedures. Furthermore, ecologically and economically feasible solutions were optimized through ML-based recycling procedures to increase the leaching efficiency and the recovery of the REEs. This analysis emphasizes the importance of collective technological, environmental, and policy initiatives to achieve sustainable NdFeB recycling and long-term resource availability. These findings offer important perspectives into developing effective and environmentally friendly NdFeB waste recycling solutions via the integration of ML. Full article
(This article belongs to the Special Issue Advances in Magnetic Materials and Applications)
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