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Electrical, Thermal and Magnetic Properties of Alloys

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

Deadline for manuscript submissions: closed (20 February 2022) | Viewed by 2994

Special Issue Editor

Departamento de Estructuras y Física de Edificación, ETSAM, Universidad Politécnica de Madrid, Avenida Juan Herrera 4, 28040 Madrid, Spain
Interests: 3d and 4f based alloys; crystalline and nanocrystalline; size and disorder effects; magnetic, electric and thermal properties; novel phenomena

Special Issue Information

Dear Colleagues,

In last years, research on Rare earth and transition metals based alloys has shown that these kind of materials merit  special attention in revealing novel phenomena, in the understanding of the properties from fundamental and applied points of view, as size effects in nanocrystalline systems, novel magnetic behaviour, magnetocaloric and thermoelectric effects, to cite a few. This category of materials must include the special case of strongly correlated electron systems based on Ce, Yb and U (5f- actinide) elements, with an additional phenomenology related among others and the presence of Non Fermi liquid and Kondo behaviours or unconventional superconductivity.

This Special Issue will focus on recent findings on the properties of 4f (Rare Earth) and 3d (transition metals) based alloys in both crystalline and nanocrystalline forms. Reports on strongly correlated electron systems (Ce, Yb and U-based alloys) are also included. The manuscripts may be of theoretical and/or experimental nature, highlighting details of the theoretical models or experimental techniques used for the characterization and  explanation of the observed behaviour. Potential technological applications resulting from the electrical, thermal and magnetic properties of the materials are also welcome.

We invite you to contribute full papers, reviews or communications to this Special Issue. In order to be considered for publication the manuscripts must demonstrate novelty and advance over previously reported data.

Prof. Daniel Rojas Pupo
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

  • Rare earth and transition metal based alloys
  • Strongly correlated systems
  • Crystalline and nanocrystalline materials
  • Magnetocaloric effect
  • Magnetic properties
  • Electronic transport
  • Thermal properties
  • Thermoelectric properties

Published Papers (2 papers)

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Research

11 pages, 1695 KiB  
Article
Influence of Anomalous Changes in the Crystal Structure on the Transport Properties of YbNi1−xCuxAl Series of Alloys
by Daniel Rojas Pupo, Flávio Guimarães Gandra and Luis Fernández Barquín
Materials 2022, 15(5), 1688; https://0-doi-org.brum.beds.ac.uk/10.3390/ma15051688 - 24 Feb 2022
Cited by 1 | Viewed by 983
Abstract
Results of the transport properties of the YbNi1−xCuxAl (x = 0, 0.2, 0.5, 0.8 and 1.0) series of alloys are reported. The previous analysis of X-ray diffraction patterns indicates that all compounds crystallize in the hexagonal ZrNiAl structure with [...] Read more.
Results of the transport properties of the YbNi1−xCuxAl (x = 0, 0.2, 0.5, 0.8 and 1.0) series of alloys are reported. The previous analysis of X-ray diffraction patterns indicates that all compounds crystallize in the hexagonal ZrNiAl structure with a linear behavior of the unit cell volume as a function of the Cu concentration (x). This is not found in the unit cell parameters, showing a discontinuity between x = 0.5 and 0.8. Such discontinuities affect the behavior of the electrical resistivity, in which the position of the minimum temperature changes from 95 K to 175 K, and a rise in the low temperature slope in the magnetic contribution (with -lnT dependence) from 21 μΩcm to 212 μΩcm is observed. In addition, the electronic coefficient of the specific heat increases almost twofold from 125 mJ/mol·K2 (x = 0.5) to 246 mJ/mol·K2 (x = 0.8). These changes are attributed to the variation of the distance between Yb and transition metals (Ni and Cu) along the series and the different electronic properties of the transition metals (Ni and Cu). Full article
(This article belongs to the Special Issue Electrical, Thermal and Magnetic Properties of Alloys)
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13 pages, 3656 KiB  
Article
Study on the Magnetocaloric Effect of Room Temperature Magnetic Refrigerant Material La0.5Pr0.5(Fe1−xCox)11.4Si1.6 and the Effect Arising from Co Doping on Its Curie Temperature
by Tao Shang, Lin Zheng, Jianjun Zhao, Guodong Li and Ruixia Wu
Materials 2022, 15(4), 1589; https://0-doi-org.brum.beds.ac.uk/10.3390/ma15041589 - 20 Feb 2022
Viewed by 1556
Abstract
The arc-melting method was adopted to prepare the compound La0.5Pr0.5(Fe1−xCox)11.4Si1.6 (x = 0, 0.02, 0.04, 0.06, 0.08), and the magnetocaloric effect of the compound was investigated. As indicated by the [...] Read more.
The arc-melting method was adopted to prepare the compound La0.5Pr0.5(Fe1−xCox)11.4Si1.6 (x = 0, 0.02, 0.04, 0.06, 0.08), and the magnetocaloric effect of the compound was investigated. As indicated by the powder X-ray diffraction (XRD) results, after receiving 7-day high temperature annealing at 1373 K, all the compounds formed a single-phase cubic NaZn13 crystal structure. As indicated by the magnetic measurement, the most significant magnetic entropy change |∆SM(T)| of the sample decreased from 28.92 J/kg·K to 4.22 J/kg·K with the increase of the Co content under the 0–1.5 T magnetic field, while the Curie temperature TC increased from 185 K to the room temperature 296 K, which indicated that this series of alloys are the room temperature magnetic refrigerant material with practical value. By using the ferromagnetic Curie temperature theory and analyzing the effect of Co doping on the exchange integral of these alloys, the mechanism that the Curie temperature of La0.5Pr0.5(Fe1−xCox)11.4Si1.6 and La0.8Ce0.2(Fe1−xCox)11.4Si1.6 increased with the increase in the Co content was reasonably explained. Accordingly, this paper can provide a theoretical reference for subsequent studies. Full article
(This article belongs to the Special Issue Electrical, Thermal and Magnetic Properties of Alloys)
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