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Crystal structures and magnetic properties of nickel chain compounds PbM$$_2$$Ni$$_6$$Te$$_3$$O$$_{18}$$ (M = Mn, Cd)

ニッケル鎖化合物PbM$$_2$$Ni$$_6$$Te$$_3$$O$$_{18}$$(M=Mn, Cd)の結晶構造と磁性

土井 貴弘*; 鈴木 遼*; 日夏 幸雄*; 樹神 克明  ; 井川 直樹 

Doi, Yoshihiro*; Suzuki, Ryo*; Hinatsu, Yukio*; Kodama, Katsuaki; Igawa, Naoki

The synthesis, crystal structures, and magnetic properties of the pentanary oxides PbM$$_2$$Ni$$_6$$Te$$_3$$O$$_{18}$$ (M = Mn and Cd) were investigated. These compounds crystallize in a hexagonal structure with space group $$P6_3/m$$, in which the Ni$$^{2+}$$ ions form a zigzag chain along the c axis. From the magnetic susceptibility and specific heat measurements, we found that the PbCd$$_2$$Ni$$_6$$Te$$_3$$O$$_{18}$$ behaves as a low-dimensional magnet due to the intrachain an tiferromagnetic interaction between Ni$$^{2+}$$ ions. Both compounds show a long-range antiferromagnetic ordering at 25.7 K (M = Cd) and 86.0 K (Mn). The magnetic structure of PbMn$$_2$$Ni$$_6$$Te$$_3$$O$$_{18}$$ determined by neutron diffraction measurements is a collinear antiferromagnetic arrangement of Mn$$^{2+}$$ ions in the Mn$$_2$$O$$_9$$ dimeric unit and Ni$$^{2+}$$ ions in the zigzag chain.

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パーセンタイル:31.75

分野:Chemistry, Inorganic & Nuclear

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