Large Magnetocaloric Effect of PrNi Compound at Liquid-Hydrogen Temperatures

Yawei Gao, Xinqi Zheng*, Hu Zhang, Dingsong Wang, Baojie Jin, Hao Liu, Shanshan Zhen, Jiahao Gao, Yang Pan, Lei Xi, Jun Liu, Zhenxing Li, Jun Shen, Shouguo Wang*, Baogen Shen

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

In the work, polycrystalline PrNi compound was synthesized by the arc-melting method. The crystal structure is determined as a CrB-type orthorhombic structure (Space group Pnma). The Curie temperature ( T_ C ) is determined to be 21.0 K according to the maximum absolute value of the first derivative of magnetization. The slope of the Arrott plots is positive around phase transition temperature, indicating the second-order phase transition (SOPT) characteristic. The magnetic entropy change ( -δ S_ M ) was calculated from the isothermal magnetization data based on Maxwell's relationship. The maximum value of -δ S_ M is calculated to be 7.3 and 13.0 J/kg ċ K for the magnetic field changes of 0-2 and 0-5 T, respectively. The large magnetocaloric effect (MCE) around 21.0 K with a SOPT feature indicates that PrNi is great potential in the application of magnetic refrigeration for hydrogen liquefaction.

Original languageEnglish
Article number2500804
JournalIEEE Transactions on Magnetics
Volume59
Issue number11
DOIs
Publication statusPublished - 1 Nov 2023

Keywords

  • Magnetic properties
  • PrNi compound
  • magnetocaloric effect (MCE)

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Gao, Y., Zheng, X., Zhang, H., Wang, D., Jin, B., Liu, H., Zhen, S., Gao, J., Pan, Y., Xi, L., Liu, J., Li, Z., Shen, J., Wang, S., & Shen, B. (2023). Large Magnetocaloric Effect of PrNi Compound at Liquid-Hydrogen Temperatures. IEEE Transactions on Magnetics, 59(11), Article 2500804. https://doi.org/10.1109/TMAG.2023.3282050