Low-temperature magnetic properties of the S= 1/2 kagomé antiferromagnet YCo3(OH)6.55Br2.45

Zhenwei Yu; Hui Liang; Yiyan Wang; Na Li; Yan Sun; Dandan Wu; Ying Zhou; Zongling Ding; Jin Sun; Tianbo He; Ziyang Wu; Junfeng Wang; Xuefeng Sun; Qiuju Li

doi:10.1088/1361-648X/ad7434

Low-temperature magnetic properties of the S= 1/2 kagomé antiferromagnet YCo₃(OH)_6.55Br_2.45

J Phys Condens Matter. 2024 Sep 6;36(49). doi: 10.1088/1361-648X/ad7434.

Authors

Zhenwei Yu¹, Hui Liang², Yiyan Wang², Na Li², Yan Sun², Dandan Wu², Ying Zhou², Zongling Ding³, Jin Sun³, Tianbo He³, Ziyang Wu⁴, Junfeng Wang⁴, Xuefeng Sun², Qiuju Li^{2

3}

Affiliations

¹ School of Materials Science and Engineering, Anhui University, Hefei 230601, People's Republic of China.
² Anhui Key Laboratory of Magnetic Functional Materials and Devices, Institutes of Physical Science and Information Technology, Anhui University, Hefei 230601, People's Republic of China.
³ School of Physics and Optoelectronic engineering, Anhui University, Hefei 230601, People's Republic of China.
⁴ Wuhan National High Magnetic Field Center, Huazhong University of Science and Technology, Wuhan, Hubei 430074, People's Republic of China.

PMID: 39191272
DOI: 10.1088/1361-648X/ad7434

Abstract

We report the synthesis, crystal structure, magnetization and specific heat studies of YCo₃(OH)_6.55Br_2.45single crystal. YCo₃(OH)_6.55Br_2.45crystallizes in trigonal structure, in which Co²⁺ions form a perfect kagomé lattice. The magnetic susceptibility reveals successive magnetic transitions at 6.5 and 7.8 K and the Curie-Weiss fitting demonstrates that YCo₃(OH)_6.55Br_2.45has strong antiferromagnetic coupling and pronounced magnetic frustration effect. Specific heat data suggest that low-Tmagnetic transitions are attributed to antiferromagnetic ordering of Co²⁺ions and the magnetic entropy points to effective 1/2 spin in the system. These results indicate that an unusual magnetic ordering state with effective spin-1/2 is realized in kagomé lattice system YCo₃(OH)_6.55Br_2.45.

Keywords: YCo3(OH)6.55Br2.45; hydrothermal method; kagomé-lattice antiferromagnet; magnetic transitions.