Synthesis, crystal structure, and physical properties of a triangular-lattice magnet K2Co(HPO4)(C2O4)(OH2)center dot H2O

Chang, Siliang1; Guo, Shu2,3; Li, Ning1; Li, Yongpeng1; Liu, Shanshan1; He, Tao1; Yang, Xin1; Feng, Kai1

2023

10.1016/j.jssc.2022.123710

JOURNAL OF SOLID STATE CHEMISTRY   Impact Factor & Quartile

0022-4596

1095-726X

A previously unreported geometrically frustrating cobalt oxalatophosphate, K2Co(HPO4)(C2O4)(OH2)center dot H2O (KCoCP), is solvothermally synthesized and characterized. KCoCP shows a typical two-dimensional (2D) layered structure of [Co(HPO4)(C2O4)(OH2)]2-separated by K+ and H2O, which is isostructural to the previously reported Fe analogue. Specifically, the magnetic Co2+ ions sit on a distorted triangular lattice (TL) and introduce geometrical frustration into the system. The mainstay of the 2D layer [Co(HPO4)(C2O4)(OH2)]2-is cobalt oxalate skeleton with HPO4 and H2O groups staggering on both sides. The Bravais-Friedel-Donnay-Harker (BFDH) theory, which is used to predict the polyhedral morphology and crystal growth faces, indicates a chamfer poly-hedron morphology of KCoCP crystal. UV-vis diffuse reflection and electronic structure calculation suggest KCoCP being a semiconductor with an indirect band gap (0.214 eV). The absence of long-range magnetic ordering for KCoCP is proved via a combination of magnetic susceptibility and specific-heat measurements down to 1.8 K. Thus, KCoCP shows potential to investigate unconventional low temperature physical properties in TL system.

Oxalatophosphate Geometrical frustration 2D layer Semiconductor Magnetic properties

SCI

English

Others

Natural Science Foundation of Shandong Province["ZR2020ME056","ZR2020MB069"] ; Yantai Science and Technology Bureau[2021JMRH006] ; National Natural Science Foundation of China[22205091]

Chemistry

Chemistry, Inorganic & Nuclear ; Chemistry, Physical

WOS:000892353200008

ACADEMIC PRESS INC ELSEVIER SCIENCE

CHEMISTRY

Web of Science

1.Yantai Univ, Chem & Chem Engn Collage, Yantai 264005, Peoples R China
2.Southern Univ Sci & Technol, Shenzhen Inst Quantum Sci & Engn, Shenzhen 518055, Peoples R China
3.Int Quantum Acad, Shenzhen 518048, Peoples R China

Chang, Siliang,Guo, Shu,Li, Ning,et al. Synthesis, crystal structure, and physical properties of a triangular-lattice magnet K2Co(HPO4)(C2O4)(OH2)center dot H2O[J]. JOURNAL OF SOLID STATE CHEMISTRY,2023,317.

Chang, Siliang.,Guo, Shu.,Li, Ning.,Li, Yongpeng.,Liu, Shanshan.,...&Feng, Kai.(2023).Synthesis, crystal structure, and physical properties of a triangular-lattice magnet K2Co(HPO4)(C2O4)(OH2)center dot H2O.JOURNAL OF SOLID STATE CHEMISTRY,317.

Chang, Siliang,et al."Synthesis, crystal structure, and physical properties of a triangular-lattice magnet K2Co(HPO4)(C2O4)(OH2)center dot H2O".JOURNAL OF SOLID STATE CHEMISTRY 317(2023).