[8p-E217-1~15] 9.5 New functional materials and new phenomena

2:00 PM - 2:15 PM JST(5:00 AM - 5:15 AM UTC)Presentation by Applicant for JSAP Young Scientists Presentation Award

[8p-E217-3] Enhancement of Cryogenic Magnetic Refrigeration Performance of Rare-Earth Based Heavy-Fermion Intermetallic Compounds via Composition Tuning

〇(PC)Kanta Watanabe¹, Kazunori Umeo¹, Takahiro Onimaru¹, Yasuyuki Shimura¹ (1.AdSE, Hiroshima Univ.)

Keywords:

Magnetic refrigeration,Heavy-Fermion,Composition tuning

Magnetic refrigeration has recently attracted attention as a technique for achieving cryogenic temperatures below 1 K without using the scarce resource ³He. In this study, we focused on Ce/Yb-based heavy-fermion intermetallic compounds with the aim of developing new magnetic refrigerants. We improved the refrigeration performance through elemental substitution and found that the minimum temperature reached by magnetic refrigeration strongly depends on composition. Furthermore, we demonstrated cooling below 0.2 K in a Ce-based intermetallic compound, which had remained largely unexplored as a magnetic refrigerant. These results highlight the potential of this Ce-based heavy-fermion intermetallic compound as a magnetic refrigerant for cryogenic applications.