Crystal Structure and Magnetic Properties of Intermetallics

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

Deadline for manuscript submissions: 25 June 2025 | Viewed by 766

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Critical Materials Institute, Ames National Laboratory, Ames, IA 50011, USA
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Dear Colleagues,

Magnetic intermetallic compounds are known for their intricate crystal, electronic, and magnetic structures, exhibiting remarkable properties, such as the giant magnetocaloric effect, half-metallic behaviors, giant magnetoresistance, strong magnetocrystalline anisotropy, and magnetostriction. These fascinating characteristics have attracted significant research interest due to their potential applications in magnetic refrigeration, spintronics, magnetic recording, and permanent magnets. Recently, the relationships between crystal structure, electronic structure, chemical bond, magnetic structure, and magnetic properties have been extensively studied using theoretical, computational, and experimental methods.

To highlight recent advancements, this Special Issue aims to gather papers on a broad spectrum of topics related to magnetic intermetallic compounds. These topics include crystal, electronic, and magnetic structures; chemical bonds; magnetocrystalline anisotropy; exchange interaction; hard magnetic materials; Heusler alloys; magnetocaloric effects and materials; magnetostrictive materials; magnetic shape memory alloys; and magnetic alloys for spintronic devices. We are particularly interested in research exploring the correlation between structure and properties in magnetic compounds. We welcome original theoretical, computational, and experimental research articles, as well as comprehensive reviews.

Dr. Xubo Liu
Guest Editor

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Keywords

  • crystal structure
  • electronic structure
  • magnetic structure
  • magnetic properties
  • magnetization
  • exchange interactions
  • magnetocrystalline anisotropy
  • magnetocaloric
  • magnetostrictive
  • magneto-optic
  • Heusler compounds
  • rare earth transition metal compounds

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Published Papers (1 paper)

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Research

19 pages, 9365 KiB  
Article
Evaluations of Microstructure in Ultra-Fine-Grained Matrix with Sintering-Assisted ECAP Process in Aluminum–Nickel Powders
by Ahmet Güral and Ümit Demir
Crystals 2024, 14(12), 1060; https://doi.org/10.3390/cryst14121060 - 8 Dec 2024
Viewed by 652
Abstract
The aim of this study was the synthesis of intermetallic crystal dispersion in an ultra-fine-grained (UFG) aluminum matrix by the equal-channel angular pressing (ECAP) process, which provides severe plastic deformation (SPD) of aluminum-5 and 10% wt. nickel powders. The ECAP process of up [...] Read more.
The aim of this study was the synthesis of intermetallic crystal dispersion in an ultra-fine-grained (UFG) aluminum matrix by the equal-channel angular pressing (ECAP) process, which provides severe plastic deformation (SPD) of aluminum-5 and 10% wt. nickel powders. The ECAP process of up to 20 passes was carried out at 200 °C. Intermetallic crystal particles in the UFG Al matrix were obtained in sintered samples at 500 °C for 1 and 5 h, interrupting the ECAP process. The scanning electron microscope (SEM) images were received for the microstructural evaluations. According to the SEM images, it was understood according to the quantitative observation and energy dispersive spectroscopy (EDS) analysis results that the Ni powders added to Al mostly remained in the block state in the matrix structure after the ECAP processes but started to dissolve in the matrix by increasing the ECAP pass number and sintering temperature. DSC and XRD analyses were carried out to investigate intermetallic crystal evaluation in the material. According to DSC analyses, the melting degrees of the alloys increase with the amount of Ni added. Melting enthalpies and melting degrees showed small changes in the number of ECAP passes. Also, electron backscatter diffraction (EBSD) images were obtained for the samples’ grain size and grain boundary angle measurements. It has been understood that the number of passes and the process temperature are effective parameters for the solid-state synthesis of Al3Ni intermetallic crystals in UFG by the ECAP process. Full article
(This article belongs to the Special Issue Crystal Structure and Magnetic Properties of Intermetallics)
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