High-pressure synthesis and characterizations of a new ternary Ce-based compound Ce3TiAs5

L C Fu; L C Shi; X M Chen; L Duan; Y Peng; J Zhang; J Song; Z Deng; S J Zhang; J F Zhao; Y Liu; J F Zhang; J L Zhu; X C Wang; C Q Jin

doi:10.1088/1361-648X/ad7fb4

High-pressure synthesis and characterizations of a new ternary Ce-based compound Ce₃TiAs₅

J Phys Condens Matter. 2024 Oct 14;37(1). doi: 10.1088/1361-648X/ad7fb4.

Authors

L C Fu^{1

2}, L C Shi^{1

3}, X M Chen^{1

4}, L Duan⁴, Y Peng^{1

3}, J Zhang¹, J Song¹, Z Deng¹, S J Zhang¹, J F Zhao¹, Y Liu⁵, J F Zhang¹, J L Zhu^{2

5}, X C Wang^{1

3}, C Q Jin^{1

3}

Affiliations

¹ Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, People's Republic of China.
² Department of Physics, Southern University of Science and Technology, Shenzhen 518055, People's Republic of China.
³ School of Physics, University of Chinese Academy of Sciences, Beijing 100190, People's Republic of China.
⁴ School of Materials Science and Engineering, Henan University of Technology, Zhengzhou 450007, People's Republic of China.
⁵ Quantum Science Center of Guangdong-Hong Kong-Macao Greater Bay Area (Guangdong), Shenzhen 518045, People's Republic of China.

PMID: 39321833
DOI: 10.1088/1361-648X/ad7fb4

Abstract

We report the structure and properties of a new Ce-based compound Ce₃TiAs₅synthesized under high-pressure and high-temperature conditions. It crystallizes in a hexagonal Hf₅Sn₃Cu-anti type structure with zig-zag like Ce chains along thecaxis. This compound is metallic and undergoes a magnetic phase transition atT_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*K²), 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 temperatureT_Ngradually increases in the sequence of Ce₃TiPn₅with Pn = Bi, Sb, and As, which implies that the Ruderman-Kittel-Kasuya-Yosida interaction should be still predominant in Ce₃TiAs₅.

Keywords: Kondo effect; heavy fermion; magnetism; quasi 1D structure.