High-pressure synthesis and characterizations of a new ternary Ce-based compound Ce 3 TiAs 5

作者：Lin Fu, Liya Shi, Xiaoming Chen, L Duan, Yi Peng, Jun Zhang, Jing Song, Zheng Deng, Sijia Zhang, Jianfa Zhao, Ying Liu, Jianfeng Zhang, Jinlong Zhu, Xiancheng Wang, Changqing Jin · 发表于：Journal of Physics Condensed Matter · 年份：2024 · DOI：10.1088/1361-648x/ad7fb4 · 被引用次数：6 · 研究领域：Rare-earth and actinide compounds、Iron-based superconductors research、Inorganic Chemistry and Materials

Abstract We report the structure and properties of a new Ce-based compound Ce 3 TiAs 5 synthesized under high-pressure and high-temperature conditions. It crystallizes in a hexagonal Hf 5 Sn 3 Cu-anti type structure with zig-zag like Ce chains along the c axis. This compound is metallic and undergoes a magnetic phase transition at T N = 13 K. A metamagnetic transition occurs at ∼0.7 T. The Sommerfeld coefficient for the compound is determined to be about 215 mJ/(Ce-mol*K 2 ), demonstrating a heavy Fermion behavior. The resistivity is featured with two humps, which arises from the synergistic effect of crystal electric field and magnetic scattering. The magnetic ordering temperature T N gradually increases in the sequence of Ce 3 TiPn 5 with Pn = Bi, Sb, and As, which implies that the Ruderman–Kittel–Kasuya–Yosida interaction should be still predominant in Ce 3 TiAs 5 .