title: Synthesis and magnetic properties of new tellurate compounds Na4MTeO6(M = Co and Ni) with a ferromagnetic spin-chain structure.
abstract: New tellurate compounds Na4MTeO6(M = Co and Ni) were synthesized by a conventional high-temperature solid-state reaction. The title compounds crystallize in the monoclinic system of a space group P2/c and the triclinic system of a space group P1[combining macron], respectively. Both compounds exhibit a zigzag spin-chain structure, in which Na4CoTeO6shows uniform chains built by Co2+ions and Na4NiTeO6shows alternating chains built by Ni2+ions. Magnetic measurements confirm that Na4CoTeO6and Na4NiTeO6possess an antiferromagnetic ordering at TN= ∼3 K and ∼6.5 K, respectively, while a metamagnetic transition can be observed in the magnetization curve with an increasing field at 2 K.
authors.affiliation: State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, P. R. China. hezz@fjirsm.ac.cn hcz1988@hotmail.com.
authors.forename: Zhangzhen
authors.initials: Z
authors.lastname: He
authors.forename: Wenbin
authors.initials: W
authors.lastname: Guo
authors.forename: Meiyan
authors.initials: M
authors.lastname: Cui
authors.forename: Yingying
authors.initials: Y
authors.lastname: Tang