首页|Magnetic behaviors and magnetocaloric effects in rare earth high-entropy amorphous/nanocrystalline alloys

Magnetic behaviors and magnetocaloric effects in rare earth high-entropy amorphous/nanocrystalline alloys

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Rare earth high-entropy alloys(RE-HEAs)exhibit great potential to be applied as refrigerants due to their good comprehensive magnetocaloric properties.In this work,octary GdTbDyHoErTmCoAl and GdTbDyHoErTmCoNi RE-HEAs with amorphous/nanocrystalline structure exhibiting comparable mag-netocaloric effect were synthesized.Both RE-HEAs show a second-order magnetic phase transition in the temperature range of hydrogen liquefaction.Due to the complex magnetic interactions,a spin glass-like behavior at low temperatures is observed in the RE-HEAs.A superior magnetocaloric effect is ob-tained in the nanocrystalline GdTbDyHoErTmCoNi high-entropy alloy that is multiphase attributed to a stronger magnetic exchange interaction when compared with the other that exhibits single amorphous structure.Despite heterogeneous microstructure,homogeneous chemical distributions are observed in the partially crystallized high-entropy alloy.In addition,the magnetocaloric effect and magnetic tran-sition behavior of rare earth medium-and high-entropy alloys,including the RE-HEAs in this study,are summarized and discussed.The results in this work provide a helpful guide for the design of RE-HEAs for hydrogen liquefaction applications with excellent magnetocaloric effects.

Rare earthsHigh-entropy alloyMetallic glassMagnetocaloric effect

Lin Xue、Liliang Shao、Baosen Zhang、Zongzhen Li、Jiangbo Cheng、Baolong Shen

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College of Mechanics and Materials,Hohai University,Nanjing,211106,China

School of Materials Science and Engineering,Jiangsu Key Laboratory of Advanced Metallic Materials,Southeast University,Nanjing,211189,China

School of Materials Science and Engineering,Nanjing Institute of Technology,Nanjing,211167,China

Jiangsu JITRI Advanced Energy Materials Research Institute Co.,Ltd.,Changzhou,213000,China

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National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaChina Postdoctoral Science FoundationFundamental Research Funds for the Central UniversitiesNatural Science Foundation of Jiangsu ProvinceJiangsu Planned Projects for Postdoctoral Research Funds

52101193519751832022M711002B220202036BK202013162021K646C

2024

10.1016/j.jre.2022.12.001

稀土学报(英文版)
中国稀土学会

稀土学报(英文版)

CSTPCDEI
影响因子：1.3
ISSN：1002-0721
年,卷(期)：2024.42(1)
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