New Trends in Magnetic, Dielectric, Electrical, Optical, and Thermal Properties of Crystalline Materials

A special issue of Crystals (ISSN 2073-4352). This special issue belongs to the section "Crystalline Metals and Alloys".

Deadline for manuscript submissions: 27 November 2024 | Viewed by 1761

Special Issue Editors


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Guest Editor
Department of Physics, Campus Montilivi s/n, University of Girona, 17003 Girona, Spain
Interests: powder metallurgy; structural analysis; thermal analysis; mechanical alloying; nanocrystalline
Special Issues, Collections and Topics in MDPI journals

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Guest Editor
Department of Chemistry, College of Science, Qassim University, Buraidah 51452, Saudi Arabia
Interests: nanostructure; metallic and alloys; mechanical alloying; ECAP process; microstructure; magnetic property
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

In recent years, there has been a lot of study and application of metal and alloy materials. A multitude of functional (magnetic, dielectric, electrical, optical, and thermal) and mechanical responses and characteristics have been identified and described through their microstructural and structural characterization (including anisotropy and texture). Novel techniques for manufacturing and examination of these crystalline materials have been reported. Meanwhile, their application in the relevant industries and performance evaluation were presented. Many factors, including fine particle size, shape, capping, surfactant, doping, and defect structure, among many others, influence functional performance. Furthermore, such materials with specific chemical and physical properties for a certain application can be produced using a variety of chemical, physical, and mechanical procedures.

A general overview of the topic of crystalline materials, with potential extensions to the nanocrystalline field, is the focus of this Special Issue, “New Trends in Magnetic, Dielectric, Electrical, Optical, and Thermal Properties of Crystalline Materials”, which follows the previous Special Issue (https://www.mdpi.com/journal/crystals/special_issues/516XCV9K09). These materials' applications, synthesis, simulation, and characterization, along with an examination of their structural, magnetic, dielectric, electrical, optical, and thermal properties, are all of interest.

Prof. Dr. Joan-Josep Suñol
Prof. Dr. Khitouni Mohamed
Guest Editors

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Keywords

  • metals and alloys
  • crystalline materials
  • nanocrystalline
  • structural properties
  • magnetic properties
  • dielectric properties
  • electrical properties
  • optical properties
  • thermal properties
  • powder metallurgy
  • mechanical alloying

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Published Papers (2 papers)

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Research

16 pages, 8853 KiB  
Article
Titanium Nitride as an Alternative Plasmonic Material for Plasmonic Enhancement in Organic Photovoltaics
by Atacan Tütüncüoğlu, Meral Yüce and Hasan Kurt
Crystals 2024, 14(9), 828; https://doi.org/10.3390/cryst14090828 - 23 Sep 2024
Cited by 1 | Viewed by 659
Abstract
This paper investigates TiN for its potential to enhance light-harvesting efficiency as an alternative material to Au for nanoscale plasmonic light trapping in thin-film solar cells. Using nanosphere lithography (NSL), plasmonic arrays of both Au and TiN are fabricated and characterized. Later, the [...] Read more.
This paper investigates TiN for its potential to enhance light-harvesting efficiency as an alternative material to Au for nanoscale plasmonic light trapping in thin-film solar cells. Using nanosphere lithography (NSL), plasmonic arrays of both Au and TiN are fabricated and characterized. Later, the fabricated TiN and Au arrays are integrated into a thin-film organic photovoltaic (OPV) device with a PBDB-T:ITIC-M bulk heterojunction (BHJ) active layer. A comparative study between these Au and TiN nanostructured arrays evaluates their fabrication process and plasmonic response, highlighting the advantages and disadvantages of TiN compared to a conventional plasmonic material such as Au. The effect of the fabricated arrays when integrated into an OPV is presented and compared to understand the viability of TiN. As one of the first experimental studies utilizing TiN arrays for the plasmonic enhancement of photovoltaics, the results offer valuable insight that can guide future applications and decisions in design. Full article
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14 pages, 3921 KiB  
Article
The Electrical Resistivity of Liquid Fe-16wt%S-2wt%Si at High Pressures and the Effect of S and Si on the Dynamo in the Ancient Vestan Core
by Erin M. Lenhart, Wenjun Yong and Richard A. Secco
Crystals 2024, 14(6), 565; https://doi.org/10.3390/cryst14060565 - 19 Jun 2024
Viewed by 768
Abstract
A critical component of predicting thermal convection and dynamo action in the cores of terrestrial planetary bodies is the adiabatic heat flux at the top of the core. Powders of Fe, FeS, and Fe-9wt%Si were mixed to imitate the core of Asteroid 4 [...] Read more.
A critical component of predicting thermal convection and dynamo action in the cores of terrestrial planetary bodies is the adiabatic heat flux at the top of the core. Powders of Fe, FeS, and Fe-9wt%Si were mixed to imitate the core of Asteroid 4 Vesta, which studies of HED meteorites indicate is comprised of 13–16wt%S and 1–2wt%Si. In a 1000-ton cubic anvil press, the voltage drop across an Fe-16wt%S-2wt%Si sample of 8–10 mm3 was measured at 2, 3, 4, and 5 GPa and ~300–2000 K. The resistivity of Fe-16wt%S-2wt%Si is 400 ± 50 μΩ·cm for 2–5 GPa for the complete liquid state. Using the Wiedemann–Franz Law, this gives an electronic thermal conductivity of 11 ± 1.5 W/m/K for 2–4 GPa at complete melting and an adiabatic heat flow of 55 ± 15 MW at the top of an early Fe-16wt%S-2wt%Si Vestan core. The 2 GPa boundary of the miscibility of Fe-16wt%S-2wt%Si is observed. The adiabatic heat flow through an Fe-16wt%S-2wt%Si core of variable size is discussed, as well as the resistivity of liquid Fe alloy at small planetary core conditions as a function of S and Si alloying composition. On the basis of previous studies on binary and ternary alloys of Fe with S and/or Si, we interpolate the separate effects of S and Si on the resistivity (and inversely on thermal conductivity and core adiabatic heat flow). Full article
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