Quantified zero thermal expansion in magnetic R2Fe17-based intermetallic compounds (R = rare earth)
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Date
2023-06-13
Journal Title
Journal ISSN
Volume Title
Publisher
American Chemical Society
Abstract
Zero thermal expansion (ZTE) has been a fascinating task for the past few decades due to its great scientific and practical merits. To realize ZTE, negative thermal expansion is typically employed by chemical substitutions on tuning structure features, which often relies on trial and error. Here, we report on exploring quantification of thermal expansion with magnetic ordering in an intermetallic class of R2Fe17 (R = rare earth), which can accurately determine the ZTE composition using a documented database. It demonstrates that the magnetic ordering of the Fe-sublattice contributes to the thermal expansion anomaly through simultaneous examinations of magnetization and neutron powder diffraction. Alternative elements can be manipulated on a Fe-sublattice to control both the total ordered magnetic moments of the Fe-sublattice and Curie temperature, which tailors the temperature variation of the magnetic contributions on thermal expansion. The current work might point to a future for ZTE high throughput searches, anticipated to benefit applications. © 2023 American Chemical Society
Description
This research was supported by National Key R&D Program of China (2020YFA0406202) and National Natural Science Foundation of China (22090042, 22275015, 21731001, and 21971009). Neutron diffraction experiments were approved by the Neutron Science Proposal Review Committee of J-PARC/MLF (proposal nos. 2018A0295 and 2018B0124), ISIS Facility (proposal no. RB1820326), NIST Center for Neutron Research and Australian Nuclear Science and Technology Organisation (ANSTO).
Keywords
Thermal expansion, Iron, Rare earths, Intermetallic compounds, Magnetization, Neutron diffraction
Citation
Cao, Y., Matsukawa, T., Gibbs, A., Avdeev, M., Wang, C.-W., Wu, H., Huang, Q.-z., Ohoyama, K., Ishigaki, T., Zhou, H., Li, Q., Miao, J., Lin, K., & Xing, X. (2023). Quantified zero thermal expansion in magnetic R2Fe17-based intermetallic compounds (R = rare earth). Chemistry of Materials, 35(11), 4549-4555. doi:10.1021/acs.chemmater.3c00915