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

被引：0
|
作者：
Yu, Zhenwei [1 ]
Liang, Hui [2 ]
Wang, Yiyan [2 ]
Li, Na [2 ]
Sun, Yan [2 ]
Wu, Dandan [2 ]
Zhou, Ying [2 ]
Ding, Zongling [3 ]
Sun, Jin [3 ]
He, Tianbo [3 ]
Wu, Ziyang [4 ]
Wang, Junfeng [4 ]
Sun, Xuefeng [2 ]
Li, Qiuju [2 ,3 ]
机构：
[1] Anhui Univ, Sch Mat Sci & Engn, Hefei 230601, Peoples R China
[2] Anhui Univ, Inst Phys Sci & Informat Technol, Anhui Key Lab Magnet Funct Mat & Devices, Hefei 230601, Peoples R China
[3] Anhui Univ, Sch Phys & Optoelect Engn, Hefei 230601, Peoples R China
[4] Huazhong Univ Sci & Technol, Wuhan Natl High Magnet Field Ctr, Wuhan, Hubei, Peoples R China
来源：
JOURNAL OF PHYSICS-CONDENSED MATTER | 2024年 / 36卷 / 49期
基金：
中国国家自然科学基金;
关键词：
kagom & eacute; -lattice antiferromagnet; YCo3(OH)(6.55)Br-2.45; hydrothermal method; magnetic transitions;
D O I：
10.1088/1361-648X/ad7434
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
We report the synthesis, crystal structure, magnetization and specific heat studies of YCo3(OH)(6.55)Br-2.45 single crystal. YCo3(OH)(6.55)Br-2.45 crystallizes in trigonal structure, in which Co2+ ions form a perfect kagom & eacute; lattice. The magnetic susceptibility reveals successive magnetic transitions at 6.5 and 7.8 K and the Curie-Weiss fitting demonstrates that YCo3(OH)(6.55)Br-2.45 has strong antiferromagnetic coupling and pronounced magnetic frustration effect. Specific heat data suggest that low-T magnetic 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 kagom & eacute; lattice system YCo3(OH)(6.55)Br-2.45.
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页数：8
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