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Research of Magnetic Resonance in Material Science
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Research of Magnetic Resonance in Material Science

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

Deadline for manuscript submissions: closed (10 August 2023) | Viewed by 3898

Special Issue Editor

Prof. Dr. Ireneusz Stefaniuk

E-Mail Website
Guest Editor
Institute of Materials Enginering, College of Natural Sciences, University of Rzeszow, Rejtana 16a, 35-310 Rzeszow, Poland
Interests: electron paramagnetic resonance (EPR); defects and paramagnetic centers in oxide materials and semiconductors; oxide materials; magnetic materials; molecular nanomagnets; optical materials; materials in the aerospace industry; free radicals in biological materials; nanomaterials

Special Issue Information

Dear Colleagues,

This Special Issue focuses on all aspects of magnetic resonance spectroscopy, including technical and methodological advances. Its purpose is to discuss new research achievements and applications of liquid, powder, and solid EMR, EPR, NMR, FMR, and SQUID magnetometer. Contributions to the Special Issue, both in the form of original research and review articles, may cover all aspects of magnetic resonance spectroscopy.

The issue encourages papers focusing on a greater interaction between the fundamental and applied fields of magnetism and spectroscopy, in addition to general topics covering all areas of magnetism and magnetic materials, focusing on nanomagnetism, spintronics, diluted magnetic semiconductors (DMS), nanoparticles (NP), laser crystals, carbon nanomaterials, and various applications.

I very much look forward to your contributions and hope that you can support this Special Issue on “Research of Magnetic Resonance in Material Science”.

Prof. Dr. Ireneusz Stefaniuk
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 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. 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

  • EPR
  • EMR
  • magnetic resonance
  • DMS
  • nanomagnetism
  • spintronics
  • SQUID magnetometer
  • oxide materials
  • carbon nanomaterials

Published Papers (3 papers)

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Research

23 pages, 2663 KiB  
Article
Thermodynamically-Consistent Modeling of Ferromagnetic Hysteresis
by Claudio Giorgi and Angelo Morro
Materials 2023, 16(7), 2882; https://doi.org/10.3390/ma16072882 - 04 Apr 2023
Cited by 1 | Viewed by 807
Abstract
Models of ferromagnetic hysteresis are established by following a thermodynamic approach. The class of constitutive properties is required to obey the second law, expressed by the Clausius–Duhem inequality, and the Euclidean invariance. While the second law states that the entropy production is non-negative [...] Read more.
Models of ferromagnetic hysteresis are established by following a thermodynamic approach. The class of constitutive properties is required to obey the second law, expressed by the Clausius–Duhem inequality, and the Euclidean invariance. While the second law states that the entropy production is non-negative for every admissible thermodynamic process, here the entropy production is viewed as a non-negative constitutive function. In a three-dimensional setting, the magnetic field and the magnetization are represented by invariant vectors. Next, hysteretic properties are shown to require that the entropy production is needed in an appropriate form merely to account for different behavior in the loading and the unloading portions of the loops. In the special case of a one-dimensional setting, a detailed model is determined for the magnetization function, in terms of a given susceptibility function. Starting from different initial magnetized states, hysteresis cycles are obtained by solving a nonlinear ordinary differential system. Cyclic processes with large and small amplitudes are established for materials such as soft iron. Full article
(This article belongs to the Special Issue Research of Magnetic Resonance in Material Science)
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9 pages, 3514 KiB  
Article
Flexible Magnetic Metasurface with Defect Cavity for Wireless Power Transfer System
by Le Thi Hong Hiep, Bui Xuan Khuyen, Bui Son Tung, Quang Minh Ngo, Vu Dinh Lam and Thanh Son Pham
Materials 2022, 15(19), 6583; https://doi.org/10.3390/ma15196583 - 22 Sep 2022
Cited by 1 | Viewed by 1505
Abstract
In this paper, we present a flexible magnetic metamaterial structure for enhancing the efficiency of wireless power transfer (WPT) systems operating at 13.56 MHz. The metasurface between transmitter (Tx) and receiver (Rx) coils of the WPT system is constructed of a 3 × [...] Read more.
In this paper, we present a flexible magnetic metamaterial structure for enhancing the efficiency of wireless power transfer (WPT) systems operating at 13.56 MHz. The metasurface between transmitter (Tx) and receiver (Rx) coils of the WPT system is constructed of a 3 × 5 metamaterial unit cell array with a total size of 150 × 300 mm2. Most metamaterial structures integrated into WPT systems are in planar configurations with a rigid substrate, which limits practical applications. The proposed metasurface is fabricated on an FR-4 substrate with a thin thickness of 0.2 mm; therefore, it can be bent with radii greater than 80 mm. A defect cavity is formed in the non-homogeneous metasurface by controlling the resonant frequency of the unit cell with an external capacitor. Simulation and measurement results show that the efficiency of the WPT system is significantly enhanced with metasurfaces. The performance of the WPT system can also be optimized with suitable bend profiles of metasurfaces. This proposed flexible metasurface could be widely applied to WPT systems, especially asymmetric, bendable, or wearable WPT systems. Full article
(This article belongs to the Special Issue Research of Magnetic Resonance in Material Science)
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10 pages, 674 KiB  
Article
The Low-Field Microwave Absorption in EMR Spectra for Ni50−xCoxMn35.5In14.5 Ribbons
by Łukasz Dubiel, Ireneusz Stefaniuk and Andrzej Wal
Materials 2022, 15(17), 6016; https://doi.org/10.3390/ma15176016 - 31 Aug 2022
Cited by 1 | Viewed by 970
Abstract
This paper contains a detailed study of low-field microwave absorption, which is observed in EMR spectra registered for a series of Ni50−xCoxMn35.5In14.5 (x=0,3,5) Heusler alloys polycrystalline [...] Read more.
This paper contains a detailed study of low-field microwave absorption, which is observed in EMR spectra registered for a series of Ni50−xCoxMn35.5In14.5 (x=0,3,5) Heusler alloys polycrystalline in situ and annealed at 1173 K ribbons. The LFMA spectra for all ribbons were performed at X-band (∼9.5 GHz), at temperatures below Curie temperature. Additionally, for annealed Ni45Co5Mn35.5In14.5 ribbons, the LFMA signal dependencies of the external magnetic field modulation amplitude, modulation frequency, microwave power and microwave magnetic field phase were registered. These results confirm the resonant character of LFMA. To determine the basic EMR parameters, such as linewidth and resonance field, the experimental data were fitted by the Dyson function. The LFMA signal is satisfactorily matched by the two lines, and the variability of the component lines with temperature is remarkable. Full article
(This article belongs to the Special Issue Research of Magnetic Resonance in Material Science)
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