Study on Magnetic Properties of Nanostructured Materials

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

Deadline for manuscript submissions: 10 March 2026 | Viewed by 1107

Special Issue Editors


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Guest Editor
College of Physics and Electronic Engineering, Sichuan Normal University, Chengdu, China
Interests: permanent nanomagnets; topological magnetic materials; 2D materials; micromagnetics
Special Issues, Collections and Topics in MDPI journals

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Guest Editor
College of Science, Inner Mongolia University of Science and Technology, Baotou 014010, China
Interests: theoretical research on the magnetic properties of permanent magnets with hard/soft magnetic exchange coupling; experimental study on the magnetic properties of multiphase rare-earth permanent magnets

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Guest Editor
College of Materials Science and Engineering, Beijing University of Technology, Beijing, China
Interests: new theories; new technologies; new materials of rare-earth permanent-magnet materials

Special Issue Information

Dear Colleagues, 

It is my pleasure to invite you to submit a manuscript to this Special Issue. Full papers, communications, and reviews are all welcome.

Nanostructured advanced magnetic materials have aroused growing and intensive research interest in recent years due to their high theoretical efficiency and potential applications in modern technology. Topological spin textures at the nanoscale, such as skyrmions, bimerons, and vortices, not only have advantages, such as a small size and low depinning current density, but they can also be driven by various methods, including spin currents, electric fields, magnetic anisotropy gradients, spin waves, and temperature gradients. These characteristics indicate that skyrmions and other topological spin textures are advanced information carriers for spintronic devices, such as logic gates, memory, diodes, and spin torque oscillators.

On the other hand, permanent magnets are everywhere in modern life, and play an indispensable role as components of a wide variety of electromechanical and electronic devices. High-performance permanent nanomagnets are key components of energy-related technologies, such as micromotors and e-mobility. They are also important in robotics and automatization, sensors, actuators, and information technology. Other exotic magnetic nanomaterials include soft nanomaterials, magnetic recording materials, 2D magnetic materials, antiferromagnetic materials, magnetocaloric materials, multiferroic materials, etc. 

This Special Issue covers a very wide and varied range of subject areas that fall under advanced magnetic nanomaterials (not limited to magnetic skyrmions and permanent magnets) and all aspects (theoretical, computational, experimental studies and/or industrial applications) of advanced magnetic materials, from state-of-the-art fundamental research to applied research and applications in emerging technologies. 

Prof. Dr. Guoping Zhao
Dr. Qian Zhao
Dr. Yuqing Li
Guest Editors

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Keywords

  • advanced magnetic nanomaterials
  • topological spin structures
  • permanent magnets

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Published Papers (2 papers)

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Research

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20 pages, 2145 KB  
Article
Structural Design of High-Coercivity Nd-Ce-Fe-B Magnets with Easy Axis Perpendicular Orientation and High-Abundance Ce Content Based on Micromagnetic Simulations
by Qian Zhao, Ying Yu, Chenlin Tang, Qingkang Hu, Suo Bai, Puyu Wang, Zhubai Li and Guoping Zhao
Nanomaterials 2025, 15(17), 1358; https://doi.org/10.3390/nano15171358 - 3 Sep 2025
Cited by 1 | Viewed by 650
Abstract
In recent years, replacing the scarce and expensive rare earth element Nd with the more abundant and lower cost Ce in the production of Nd-Ce-Fe-B permanent magnets has become a focus of both industrial and academic research. A critical challenge is how to [...] Read more.
In recent years, replacing the scarce and expensive rare earth element Nd with the more abundant and lower cost Ce in the production of Nd-Ce-Fe-B permanent magnets has become a focus of both industrial and academic research. A critical challenge is how to design the crystal structure of Nd-Ce-Fe-B magnets to compensate for the decline in magnetic performance caused by the Ce substitution. In this study, based on micromagnetic theory, Nd-Ce-Fe-B magnets with perpendicularly oriented easy axes—in which the two main phases, Nd2Fe14B and Ce2Fe14B, have a volume ratio of 1:1 but different spatial arrangements—are modeled and simulated using the MuMax3.11 software. The model is either cubic or spherical. The results from the demagnetization curve analysis indicate that the coercivity mechanism of all magnets is pinning. When the magnet volume is constant but the phase distribution differs, the Nd2Fe14B/Ce2Fe14B structure exhibits a higher coercivity and maximum energy product than the Ce2Fe14B/Nd2Fe14B structure. Furthermore, for both structural models with the same phase distribution, the coercivity and the maximum energy product decrease with the increasing volume of the main phase. Notably, the coercivity is similar when the magnet volume is very small and stabilizes after reaching a certain threshold. This qualitative conclusion was also observed in Nd-Dy-Fe-B magnets with the same structure and equal volume ratio of the two main phases. This general finding indicates that, in biphasic magnets with equal phase volumes, the phase with the larger anisotropy field located at the grain periphery can achieve a higher coercivity and maximum magnetic energy product. The analysis of the angular distribution reveals that the number of magnetic domains remains fixed at six in the Nd2Fe14B/Ce2Fe14B structure and two in the Ce2Fe14B/Nd2Fe14B structure. The in-plane magnetic moment analysis of the Ce2Fe14B/Nd2Fe14B magnet shows that the magnetic moments at the edges of the Ce2Fe14B begin to deflect first. Even at the pinning stage, the magnetic moments within the Nd2Fe14B remain unrotated. Nevertheless, the surface magnetic moments of Ce2Fe14B, through exchange coupling, drive the deflection of the interfacial and interior moments, completing the entire demagnetization process. These computational results provide theoretical guidance for related experimental studies and industrial applications. Full article
(This article belongs to the Special Issue Study on Magnetic Properties of Nanostructured Materials)
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Review

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44 pages, 10926 KB  
Review
Magnetic Iron Oxide Nanoparticles: Advances in Synthesis, Mechanistic Understanding, and Magnetic Property Optimization for Improved Biomedical Performance
by Minh Dang Nguyen, Supawitch Hoijang, Ramtin Yarinia, Melissa Ariza Gonzalez, Suman Mandal, Quoc Minh Tran, Pailinrut Chinwangso and T. Randall Lee
Nanomaterials 2025, 15(19), 1500; https://doi.org/10.3390/nano15191500 - 1 Oct 2025
Abstract
Magnetic iron oxide nanoparticles (MIONPs) represent a versatile magnetic nanoparticle (NP) system with considerable, yet underexplored, potential in diverse applications, particularly in emerging biomedical fields such as magnetic resonance imaging, magnetic hyperthermia, targeted drug delivery, and biosensing. The successful translation of MIONPs into [...] Read more.
Magnetic iron oxide nanoparticles (MIONPs) represent a versatile magnetic nanoparticle (NP) system with considerable, yet underexplored, potential in diverse applications, particularly in emerging biomedical fields such as magnetic resonance imaging, magnetic hyperthermia, targeted drug delivery, and biosensing. The successful translation of MIONPs into these applications requires reproducible synthesis methods and precise control over particle uniformity in terms of size, shape, and composition. However, reproducibility in nanoparticle synthesis remains a persistent challenge, limiting the ability of researchers to replicate results and integrate MIONPs into application-oriented studies. In recent years, substantial efforts have been directed toward elucidating synthesis mechanisms and improving both reproducibility and particle uniformity, enabling notable advances in the biomedical deployment of MIONPs. This review summarizes progress in the synthesis of MIONPs, with emphasis on three widely employed precursors: iron oleate, iron acetylacetonate, and iron pentacarbonyl. The discussion focuses on key findings in NP synthesis, relevant chemical aspects, and the magnetic properties of MIONPs, which are critical for optimizing their functional performance. By consolidating recent advances, this review aims to provide a reliable framework for the preparation of high-quality MIONPs and to support their effective use in specific biomedical applications. Full article
(This article belongs to the Special Issue Study on Magnetic Properties of Nanostructured Materials)
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