K₂RENb₅O₁₅ (RE = Ce, Pr, Nd, Sm, Gd-Ho): A Family of Quasi-One-Dimensional Spin-Chain Compounds with Large Interchain Distance

Zeng, Qingyuan1,2; Ge, Han3; Wu, Maofeng1,2; Ruan, Shaoheng1,2; Li, Tiantian3; Wang, Zhaosheng4; Li, Jingxin4; Ling, Langsheng4; Tong, Wei4; Huang, Shuai5; Liu, Andi1,2; Zhou, Jin1,2; Xia, Zhengcai1,2; Sheng, Jieming3,6; Wu, Liusuo3,6; Tian, Zhaoming1,2

2024-03-15

10.1021/acs.chemmater.3c03217

CHEMISTRY OF MATERIALS   影响因子和分区

0897-4756

1520-5002

One-dimensional (1D) spin chain systems have received special attention to discover novel magnetic ground states and emergent phenomena, while magnetic studies on rare-earth (RE)-based 1D spin chain materials are still rare. Here, we report the synthesis, structure, and magnetic behaviors of a family of tetragonal tungsten-bronze (TTB) structure K2RENb5O15 (RE = Ce, Pr, Nd, Sm, Gd-Ho) compounds, which consist of a 1D linear spin-chain structure built by RE3+ ions along the c-axis and well spatially separated by nonmagnetic K/Nb-O polyhedrons with large interchain distances of similar to 8.80-8.88 & Aring; in the ab-plane. In this family of K2RENb5O15 compounds, the nearest-neighboring interchain exchange interactions through the RE-O-K/Nb-O-RE routes are much smaller than the intrachain ones via the RE-O-RE pathways, and the low-temperature magnetic results reveal the absence of long-range magnetic order down to 1.8 K for all compounds. Among them, K2GdNb5O15, with spin-only magnetic moment S = 7/2, exhibits a long-range magnetic order with T-N similar to 0.31 K and strong spin fluctuations at low temperatures due to its low-dimension characteristics. Moreover, a large magnetocaloric effect under low field change (Delta B) of Delta B = 0-2 T is realized at temperatures below 1 K for K2GdNb5O15, making it an ideal candidate for adiabatic magnetic refrigeration applications at sub-Kelvin temperatures. The K2RENb5O15 become a rare family of insulating RE-based magnets for exploring the novel 1D spin chain physics beyond the 3d TM-based counterparts in terms of their combination of low dimension, strong spin-orbital coupling, and rich diversity of RE ions.

SCI ; EI

英语

通讯

National Natural Science Foundation of China[11874158,12374146] ; National Natural Science Foundation of China[2022A1515010658] ; Fundamental Research Funds of Guangdong Province[2022B1515120020]

Chemistry ; Materials Science

Chemistry, Physical ; Materials Science, Multidisciplinary

WOS:001186371600001

AMER CHEMICAL SOC

MATERIALS SCIENCE

Web of Science

1.Huazhong Univ Sci & Technol, Wuhan Natl High Magnet Field Ctr, Wuhan 430074, Peoples R China
2.Huazhong Univ Sci & Technol, Sch Phys, Wuhan 430074, Peoples R China
3.Southern Univ Sci & Technol, Dept Phys, Shenzhen 518055, Peoples R China
4.Chinese Acad Sci, Anhui Key Lab Low Energy Quantum Mat & Devices, High Magnet Field Lab, HFIPS, Hefei 230031, Peoples R China
5.Hangzhou Dianzi Univ, Inst Mat Phys, Key Lab Novel Mat Sensor Zhejiang Prov, Hangzhou 310018, Peoples R China
6.Southern Univ Sci & Technol, Shenzhen Key Lab Adv Quantum Funct Mat & Devices, Shenzhen 518055, Peoples R China

Zeng, Qingyuan,Ge, Han,Wu, Maofeng,et al. K₂RENb₅O₁₅ (RE = Ce, Pr, Nd, Sm, Gd-Ho): A Family of Quasi-One-Dimensional Spin-Chain Compounds with Large Interchain Distance[J]. CHEMISTRY OF MATERIALS,2024,36(6).

Zeng, Qingyuan.,Ge, Han.,Wu, Maofeng.,Ruan, Shaoheng.,Li, Tiantian.,...&Tian, Zhaoming.(2024).K₂RENb₅O₁₅ (RE = Ce, Pr, Nd, Sm, Gd-Ho): A Family of Quasi-One-Dimensional Spin-Chain Compounds with Large Interchain Distance.CHEMISTRY OF MATERIALS,36(6).

Zeng, Qingyuan,et al."K₂RENb₅O₁₅ (RE = Ce, Pr, Nd, Sm, Gd-Ho): A Family of Quasi-One-Dimensional Spin-Chain Compounds with Large Interchain Distance".CHEMISTRY OF MATERIALS 36.6(2024).