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Crystals
Special Issues
Fabrication and Properties of Magnetic Materials
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Fabrication and Properties of Magnetic Materials

A special issue of Crystals (ISSN 2073-4352). This special issue belongs to the section "Inorganic Crystalline Materials".

Deadline for manuscript submissions: closed (31 December 2023) | Viewed by 5243

Special Issue Editors

Dr. Lizhu Ren

E-Mail
Guest Editor
Department of Electrical and Computer Engineering, National University of Singapore, Singapore 117576, Singapore
Interests: fabrication of novel magnetic films; heusler alloy; spin-orbitronics; topological materials; magnetoresistive random access memory
Special Issues, Collections and Topics in MDPI journals
Dr. Xuecheng Sun

E-Mail Website
Guest Editor
School of Mechatronic Engineering and Automation, Shanghai University, Shanghai 200444, China
Interests: magnetic sensor; MEMS; magnetic biosensor; micro/nano fabrication
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Today, magnetic materials are a huge family of functional materials that play a significant role in promoting fundamental physics and industrial fields, and which can be applied to the quantum anomalous Hall effect, computer hard drives, data storage, magnetic sensing, and so on. The study of magnetic materials continues to be a vibrant area of research, with scientists exploring new materials and phenomena that may have important applications in the future.

To promote the development of magnetic materials and strengthen academic communication and innovations, we are launching this Special Issue, "Fabrication and Properties of Magnetic Materials", which will focus on the crystalline growth, and structural and physical properties of magnetic materials, including metals, alloys, compounds, and 2D materials, as well as first-principles calculations of magnetic materials. Original articles and reviews are widely solicited in the fabrication and characterization of various magnetic materials, spintronic device fabrications, magnetic sensors, and theoretical simulations. We are convinced that this Special Issue will play a beneficial role in promoting the future research on magnetic materials and applications.

Dr. Lizhu Ren
Dr. Xuecheng Sun
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. Crystals 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 2100 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 and applications
  • spintronic materials and devices
  • crystal growth and thin films
  • magnetic sensors and applications
  • first-principles calculations and micromagnetic simulations
  • bio-magnetism and chemical magnetism

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Further information on MDPI's Special Issue polices can be found here.

Published Papers (3 papers)

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Research

17 pages, 4883 KiB  
Article
Cobalt(II) Paddle-Wheel Complex with 3,5-Di(tert-butyl)-4-hydroxybenzoate Bridges: DFT and ab initio Calculations, Magnetic Dilution, and Magnetic Properties
by Tatiana V. Astaf’eva, Stanislav A. Nikolaevskii, Evgeniy N. Egorov, Stanislav N. Melnikov, Dmitriy S. Yambulatov, Anna K. Matiukhina, Marina E. Nikiforova, Maxim A. Shmelev, Aleksandr V. Kolchin, Nikolay N. Efimov, Sergey L. Veber, Artem S. Bogomyakov, Ekaterina N. Zorina-Tikhonova, Igor L. Eremenko and Mikhail A. Kiskin
Crystals 2024, 14(1), 76; https://doi.org/10.3390/cryst14010076 - 13 Jan 2024
Viewed by 1608
Abstract
A new binuclear "paddle-wheel" complex, [Co2(bhbz)4(EtOH)2]·4EtOH (1, Hbhbz-3,5-di(tert-butyl)-4-hydroxybenzoic acid); an isostructural zinc complex (2); a and magnetically diluted sample of [Zn1.93Co0.07(bhbz)4(EtOH)2]·4EtOH (3 [...] Read more.
A new binuclear "paddle-wheel" complex, [Co2(bhbz)4(EtOH)2]·4EtOH (1, Hbhbz-3,5-di(tert-butyl)-4-hydroxybenzoic acid); an isostructural zinc complex (2); a and magnetically diluted sample of [Zn1.93Co0.07(bhbz)4(EtOH)2]·4EtOH (3) were obtained. Molecular structures of 1 and 2 were determined by single-crystal X-ray diffraction. DFT calculations for 1 indicate strong Co-Co antiferromagnetic exchange interactions in the binuclear fragment. It was shown that when one paramagnetic ion in the binuclear molecule is replaced by a diamagnetic zinc(II) ion, the remaining cobalt(II) ion can be considered as an isolated center with magnetic anisotropy, the parameters of which are determined by ab initio calculations. Magnetic properties for samples 1 and 3 were investigated and analyzed in detail. Full article
(This article belongs to the Special Issue Fabrication and Properties of Magnetic Materials)
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13 pages, 4025 KiB  
Article
The Magnetic Properties and Photoactivity of Bi-Magnetic Nanostructures for Hydrogen Production
by Hind Alsnani, Manal M. Khowdiary and Mohamed S. A. Darwish
Crystals 2023, 13(10), 1527; https://doi.org/10.3390/cryst13101527 - 22 Oct 2023
Viewed by 1458
Abstract
The major challenge of hydrogen production via photocatalytic water-splitting is to utilize active photocatalysts that respond to a wide range of visible light. In this work, hybrid nanostructures purposed to combine the tunable magnetic behavior of soft/semi-hard magnetic particles have shown advantageous photoactivity. [...] Read more.
The major challenge of hydrogen production via photocatalytic water-splitting is to utilize active photocatalysts that respond to a wide range of visible light. In this work, hybrid nanostructures purposed to combine the tunable magnetic behavior of soft/semi-hard magnetic particles have shown advantageous photoactivity. A series of photocatalysts based on ferrite nanoparticles, magnetite nanoparticles (MNPs), cobalt ferrite nanoparticles (CFNPs), magnetite nanoparticles coated on cobalt ferrite nanoparticles (MNPs @ CFNPs), and cobalt ferrite nanoparticles coated on magnetite nanoparticles (CFNPs @ MNPs) were prepared. The size, morphology, magnetic properties, and optical activity of the prepared nanoparticles were characterized using multiple techniques. CFNPs @ MNPs had the largest particle size (~14 nm), while CFNPs had the smallest (~8 nm). The saturation magnetization of CFNPs @ MNPs was the highest at 55.45 emu g−1. The hydrogen yield was 60, 26, 3.8, and 93 mmole min−1 g−1 for MNPs, CFNPs, MNPs @ CFNPs, and CFNPs @ MNPs. CFNPs @ MNPs displayed a superior photocatalytic performance for hydrogen production under the magnetic force as appropriate materials for water-splitting processing. Full article
(This article belongs to the Special Issue Fabrication and Properties of Magnetic Materials)
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15 pages, 5988 KiB  
Article
Systematic Study on the Synthesis and Magnetism Properties of Manganese Ferrite MnFe2O4 by an Oxidation Roasting Process
by Shanshan Wen, Bing Chen, Junhong Zhang, Wenlong Zhan, Zhijun He and Lihua Gao
Crystals 2023, 13(10), 1509; https://doi.org/10.3390/cryst13101509 - 17 Oct 2023
Cited by 1 | Viewed by 1769
Abstract
A low-cost and high-efficiency solid reaction method has been reported as an effective technology to synthesize manganese ferrite MnFe2O4 with a spinel crystal structure. This work clarified the underlying reason for the influence mechanism of SiO2 and Al2 [...] Read more.
A low-cost and high-efficiency solid reaction method has been reported as an effective technology to synthesize manganese ferrite MnFe2O4 with a spinel crystal structure. This work clarified the underlying reason for the influence mechanism of SiO2 and Al2O3 on the synthesis of MnFe2O4. Synthetic MnFe2O4 polyhedral microparticles with a saturated magnetization of 71.19 emu/g, a ratio of saturation magnetization to residual magnetization (Ms/Mr) of 0.062 and a coercivity (Hc) of 6.50 Oe were successfully obtained at an oxidization roasting temperature of 1100 °C for 60 min. The experimental results indicate that the tetrahedral Mn2+ ions and octahedral Mn3+ ions in the crystal structure of manganese ferrite MnFe2O4 were replaced by tetrahedral Si2+ ions and octahedral Al3+ ions from (Mn2+)x(Fe2+)y(Si2+)1−x−y[Fe3+]2O4 and (Mn2+)[Fe3+]2−x[Al3+]xO4, respectively. In addition, hercynite FexMn1−xAl2O4 with a spinel crystal structure and olivine MnxFe2−xSiO4 with an orthorhombic crystal structure were partially formed in the synthesis of manganese ferrite MnFe2O4, in which some Fe2+ ions were easily replaced by Mn2+ ions to form stable hercynite MnAl2O4 and olivine Mn2SiO4 in these crystal structures. The current research work provides comprehensive insights for synthesizing manganese ferrite MnFe2O4 and continuously advances its technical progress. Full article
(This article belongs to the Special Issue Fabrication and Properties of Magnetic Materials)
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