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Co3(SeO3)(SO4)(OH)2: A Selenite-Sulfate Compound with a Distorted Kagomé Lattice
Mengsi Zhang1,2, Yujie Song3, Zhiying Zhao1
1State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, P. R. China.
Abstract:
A new selenite-sulfate compound Co3(SeO3)(SO4)(OH)2 was prepared using a typical hydrothermal reaction. This compound is found to crystallize in an orthorhombic space group of Pnma, featuring a 2D distorted kagomé structure composed of linear and zigzag Co-chains, in which the magnetic ions construct different isosceles-triangles. Our results of magnetic and specific heat measurements confirm a canted antiferromagnetic order at TN ∼ 29 K. Further, the successive field-induced metamagnetic transitions can be observed at Hc1 ∼ 1 T, Hc2 ∼ 23 T, and Hc3 ∼ 27 T, respectively. A clear magnetic hysteresis loop with a coercive field (Hc) of ∼1.4 T is also observed.
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