Magnetic Properties Analysis of Amorphous and Partially Crystallized Alloys

A special issue of Metals (ISSN 2075-4701). This special issue belongs to the section "Crystallography and Applications of Metallic Materials".

Deadline for manuscript submissions: 31 July 2024 | Viewed by 1032

Special Issue Editor

Institute of Materials, Shanghai University, Shanghai 200072, China
Interests: amorphous alloy; partially crystallized alloys; refrigeration capacity

Special Issue Information

Dear Colleagues,

We are pleased to invite you to submit articles to this Special Issue of Metals, entitled “Magnetic Properties Analysis of Amorphous and Partially Crystallized Alloys.”

Amorphous magnetic materials have long-range, disordered atomic structures, being described as either ferromagnetic, loose ferromagnetic, ferromagnetic or loose ferromagnetic. They have been rapidly developed globally as new types of magnetic material since the 1970s. As an energy-efficient and environment friendly technique, the magnetic refrigeration technique, based on the magneto-caloric effect (MCE) of the materials, is regarded as a promising alternative to conventional vapor-circle refrigeration technology. Magneto-caloric materials are usually divided into two types. Materials which undergo a first-order magnetic transition, including most of the crystalline variety, exhibit a sharp but narrow magnetic entropy change peak (-ΔSmpeak). In contrast, materials which undergo a second-order magnetic transition, including amorphous alloys and a small amount of crystalline alloys, show a broadened but low magnetic entropy change peak and this results in high RC. Amongst the the key challenges in the field of magnetic refrigerants is in obtaining a combination of the high table-like magnetic entropy change and movements across the ice point of water within different temperature ranges.

Research areas may include, but should not be limited to, the issue of magnetic refrigeration materials.

Dr. Ding Ding
Guest Editor

Manuscript Submission Information

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Keywords

  • amorphous alloy
  • partially crystallized alloys
  • refrigeration capacity

Published Papers (1 paper)

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Research

12 pages, 8041 KiB  
Article
Effect of Minor Ce Substitution for Pr on the Glass Formability and Magnetocaloric Effect of a Fe88Zr4Pr4B4 Metallic Glass
by Li-Ze Zhu, Qiang Wang, Shu-Hui Zheng, Peng-Jie Wang, Ding Ding, Ben-Zhen Tang, Peng Yu, Jin-Lei Yao and Lei Xia
Metals 2023, 13(9), 1531; https://doi.org/10.3390/met13091531 - 29 Aug 2023
Cited by 1 | Viewed by 770
Abstract
In the present work, Fe88Zr4Pr3B4Ce1 metallic glass (MG) was successfully prepared by minor Ce substitution for Pr, and compared with Fe88Zr4Pr4B4 MG in terms of glass forming [...] Read more.
In the present work, Fe88Zr4Pr3B4Ce1 metallic glass (MG) was successfully prepared by minor Ce substitution for Pr, and compared with Fe88Zr4Pr4B4 MG in terms of glass forming ability (GFA), magnetic and magnetocaloric properties. The GFA, Tc and the maximum magnetic entropy change (−ΔSmpeak) of the Fe88Zr4Pr3B4Ce1 MG were found to decrease slightly. At the same time, the possible interaction mechanism of minor Ce replacing Pr was also explained. The critical exponents (β, γ and n) obtained by the Kouvel–Fisher method indicate that Fe88Zr4Pr3B4Ce1 MG near Tc exhibits typical magnetocaloric behavior of fully amorphous alloys. The considerable maximum magnetic entropy change (−ΔSmpeak = 3.84 J/(kg × K) under 5 T) near its Curie temperature (Tc = 314 K) as well as RCP (~ 646.3 J/kg under 5 T) make the Fe88Zr4Pr3B4Ce1 MG a better candidate as a component of the amorphous hybrids that exhibit table-shape magnetic entropy change profiles within the operation temperature interval of a magnetic refrigerator. Full article
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