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Nano Research

Article Title

Broad negative thermal expansion operation-temperature window in antiperovskite manganese nitride with small crystallites

Authors

Jie Tan, State Key Laboratory of Technologies in Space Cryogenic Propellants, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing100190, China University of Chinese Academy of Sciences, Beijing100049, China
Rongjin Huang, State Key Laboratory of Technologies in Space Cryogenic Propellants, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing100190, China
Wei Wang, State Key Laboratory of Technologies in Space Cryogenic Propellants, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing100190, China
Wen Li, State Key Laboratory of Technologies in Space Cryogenic Propellants, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing100190, China University of Chinese Academy of Sciences, Beijing100049, China
Yuqiang Zhao, State Key Laboratory of Technologies in Space Cryogenic Propellants, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing100190, China University of Chinese Academy of Sciences, Beijing100049, China
Shaopeng Li, State Key Laboratory of Technologies in Space Cryogenic Propellants, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing100190, China University of Chinese Academy of Sciences, Beijing100049, China
Yemao Han, State Key Laboratory of Technologies in Space Cryogenic Propellants, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing100190, China University of Chinese Academy of Sciences, Beijing100049, China
Chuanjun Huang, State Key Laboratory of Technologies in Space Cryogenic Propellants, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing100190, China
Laifeng Li, State Key Laboratory of Technologies in Space Cryogenic Propellants, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing100190, China

Keywords

crystallite size, negative thermal expansion, magnetic transition, antiperovskite manganese nitride

Abstract

Using spark plasma sintering (SPS), Mn3Cu0.6Ge0.4N crystallites have been fabricated with different crystallite sizes, and their magnetic properties and thermal behaviors were systemically investigated. With decreasing crystallite size, the magnetic transition becomes increasingly slow, accompanied by broadening of the negative thermal expansion (NTE) operation-temperature window. The NTE operation-temperature window for the 12-nm crystallite sample reaches at 140 K, which is about 75% larger than that of the 74-nm crystallite sample. The magnetic properties and NTE operation-temperature window can be tuned by varying the crystallite size. This discovery will promote an even wider range of practical applications in precision devices.

Graphical Abstract

Publisher

Tsinghua University Press

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