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Crystals
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Magnetoelectric Materials and Their Application
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Magnetoelectric Materials and Their Application

A special issue of Crystals (ISSN 2073-4352). This special issue belongs to the section "Materials for Energy Applications".

Deadline for manuscript submissions: 10 December 2024 | Viewed by 2777

Special Issue Editor

Dr. Deepak Patil

E-Mail Website
Guest Editor
School of Materials Science and Engineering, Yeungnam University, Gyeongsan 38541, Republic of Korea
Interests: magnetoelectric composites; energy harvesters; thin films; thick films; magnetostrictive materials; piezoelectric materials

Special Issue Information

Dear Colleagues,

Multiferroic magnetoelectric (ME) materials, characterized by the concurrent presence of multiple ferroic orders such as ferromagnetic, ferroelectric, and ferroelastic behaviors, play a pivotal role in a myriad of device applications. These applications span from energy harvesting systems to magnetic field sensors and extend to electrically tunable magnetic devices used in microwave communications. The synergistic interplay between ferromagnetism and ferroelectricity gives rise to a novel coupling phenomenon known as the ME effect, which intricately correlates magnetic fields, electric fields, and mechanical deformations. Engineered multiferroic ME composites, featuring diverse connectivities like 0–3, 1–3, 1-2, and 2–2 configurations between distinct ferroelectric and ferromagnetic phases, have garnered significant attention due to their ability to offer enhanced design flexibility along with notably large ME coupling coefficients. Various strategies have been explored to amplify the ME coupling in these composites, encompassing optimizations of constituent phases, tailored ME structures, and enhancements in interfacial layers, among others. This Special Issue endeavors to consolidate recent advancements in processing techniques, fundamental understanding, practical applications, and novel materials within the realm of magnetoelectric materials. Furthermore, it seeks to elucidate future technological and scientific challenges in this dynamic field. Contributions encompassing all facets of research, including studies on single-phase materials, composite systems (both bulk and thin films), nanocomposites, as well as experimental and theoretical investigations, are warmly welcomed. Additionally, contributions addressing potential technical applications are encouraged, fostering a comprehensive exploration of the field's potential.

Dr. Deepak Patil
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. 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

  • multiferroic materials
  • magnetoelectric composites
  • magnetoelectric thin and thick films
  • magnetostrictive materials
  • piezoelectric materials
  • magnetic energy harvesters
  • magnetic field sensors
  • magnetoelectric memories
  • ceramic technology
  • polymer composites
  • nano-magnetoelectric composites
  • interface coupling

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Published Papers (3 papers)

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Research

11 pages, 3160 KiB  
Article
Ferroelectric and Structural Properties of Cobalt-Doped Lead Ferrite Thin Films Formed by Reactive Magnetron Sputtering
by Benas Beklešovas, Vytautas Stankus, Aleksandras Iljinas and Liutauras Marcinauskas
Crystals 2024, 14(8), 721; https://doi.org/10.3390/cryst14080721 - 12 Aug 2024
Viewed by 572
Abstract
Cobalt-doped lead ferrite (Pb2Fe2O5) thin films were deposited by reactive magnetron sputtering. The influence of the cobalt concentration and synthesis temperature on the structure, phase composition and ferroelectric properties of Pb2Fe2O5 thin [...] Read more.
Cobalt-doped lead ferrite (Pb2Fe2O5) thin films were deposited by reactive magnetron sputtering. The influence of the cobalt concentration and synthesis temperature on the structure, phase composition and ferroelectric properties of Pb2Fe2O5 thin films was investigated. It was determined that the increase in deposition temperature increased the grain size and density of the Co-doped PFO thin films. The XRD data demonstrated that the Co-doped Pb2Fe2O5 thin films consisted of Pb2Fe2O5 and PbO phases with a low amount of CoO and Co3O4 phases. The increase in the cobalt concentration in the Pb2Fe2O5 films slightly enhanced the cobalt oxide phase content. Polarization dependence on electric field measurement demonstrated that the highest ferroelectric properties of the Co-doped Pb2Fe2O5 films were obtained when the synthesis was performed at 550 °C temperatures. The increase in the cobalt concentration in the films enhanced the remnant polarization and coercive field values. It was found that the Co-doped Pb2Fe2O5 film deposited at 550 °C temperature and containing 10% cobalt had the highest remnant polarization (72 µC/cm2) and coercive electric field (105 kV/cm). Full article
(This article belongs to the Special Issue Magnetoelectric Materials and Their Application)
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12 pages, 600 KiB  
Article
Interplay between Structural, Electronic, and Magnetic Properties in the p0-d Semi-Heusler Compounds: The Case of Li-Based Compounds
by Kemal Özdoğan and Iosif Galanakis
Crystals 2024, 14(8), 693; https://doi.org/10.3390/cryst14080693 - 29 Jul 2024
Viewed by 666
Abstract
Half-metallic semi-Heusler compounds (also known as half-Heusler compounds) are currently at the forefront of scientific research due to their potential applications in spintronic devices. Unlike other semi-Heuslers, the p0(d0)-d compounds do not appear to crystallize in [...] Read more.
Half-metallic semi-Heusler compounds (also known as half-Heusler compounds) are currently at the forefront of scientific research due to their potential applications in spintronic devices. Unlike other semi-Heuslers, the p0(d0)-d compounds do not appear to crystallize in the typical variant of the C1b structure. We investigate this phenomenon in the p0-d Heusler compounds LiYGa and LiYGe, where Y varies between Ca and Zn, using first-principles ab initio electronic band-structure calculations. We examine the electronic and magnetic properties of these compounds in relation to the three possible C1b structures. Notably, LiVGa, LiVGe, LiMnGa, and LiCrGe are half-metallic ferromagnets across all three variations of the C1b lattice structure. Our findings will serve as a foundation for future experimental studies on these compounds. Full article
(This article belongs to the Special Issue Magnetoelectric Materials and Their Application)
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12 pages, 2435 KiB  
Article
Coercivity of (Fe0.7Co0.3)2B Nanowire and Its Bonded Magnet
by Xubo Liu and Ikenna C. Nlebedim
Crystals 2024, 14(7), 624; https://doi.org/10.3390/cryst14070624 - 6 Jul 2024
Viewed by 595
Abstract
(Fe0.7Co0.3)2B are potential permanent magnets material due to its large saturation magnetization and high Curie temperature. However, it has moderate magnetocrystalline anisotropy (MCA) and low coercivity. One way to improve its coercivity is to combine the contributions [...] Read more.
(Fe0.7Co0.3)2B are potential permanent magnets material due to its large saturation magnetization and high Curie temperature. However, it has moderate magnetocrystalline anisotropy (MCA) and low coercivity. One way to improve its coercivity is to combine the contributions from magnetocrystalline- and magnetic-shape anisotropy by preparing (Fe0.7Co0.3)2B nanowires. We study the effects of size, morphology, and surface defects on the hard magnetic properties of nanowires using micromagnetic simulation. The hard magnetic properties of (Fe0.7Co0.3)2B nanowire-bonded magnets are estimated, including the role of inter-wire magnetostatic interaction. By considering the existence of local reductions in MCA energy of up to 30% on the surface layer of nanowires, the anisotropic bonded magnet with a 65% vol. of (Fe0.7Co0.3)2B nanowires would have typical remanence, Br= 7.6–8.4 kG, coercivity, Hci= 9.6–9.9 kOe, and maximum energy product, (BH)m = 14–17.8 MGOe. Developing effective technology for synthesizing nanowires and fabricating corresponding bonded magnets is promising for manufacturing practical magnets based on the magnetic phase with a relatively low or moderate MCA, such as (Fe0.7Co0.3)2B. Full article
(This article belongs to the Special Issue Magnetoelectric Materials and Their Application)
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