Crystal Structures and Magnetic Properties of Nickel Chain Compounds PbM2Ni6Te3O18 (M = Mn, Cd)

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• 作者：Yoshihiro Doi ; Ryo Suzuki ; Yukio Hinatsu ; Katsuaki Kodama ; Naoki Igawa
• 刊名：Inorganic Chemistry
• 出版年：2015
• 出版时间：November 16, 2015
• 年：2015
• 卷：54
• 期：22
• 页码：10725-10731
• 全文大小：449K
• ISSN：1520-510X

文摘

The synthesis, crystal structures, and magnetic properties of the pentanary oxides PbM₂Ni₆Te₃O₁₈ (M = Mn and Cd) were investigated. These compounds crystallize in a hexagonal structure with space group P6₃/m, in which the Ni²⁺ ions form a zigzag chain along the c axis. From the magnetic susceptibility and specific heat measurements, we found that the PbCd₂Ni₆Te₃O₁₈ behaves as a low-dimensional magnet due to the intrachain antiferromagnetic interaction between Ni²⁺ ions. Both compounds show a long-range antiferromagnetic ordering at 25.7 K (M = Cd) and 86.0 K (Mn). The magnetic structure of PbMn₂Ni₆Te₃O₁₈ determined by neutron diffraction measurements is a collinear antiferromagnetic arrangement of Mn²⁺ ions in the Mn₂O₉ dimeric unit and Ni²⁺ ions in the zigzag chain.