Crystal Structures and Magnetic Properties of Nickel Chain Compounds PbM2Ni6Te3O18 (M = Mn, Cd).
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 Ni(2+) 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 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 PbMn2Ni6Te3O18 determined by neutron diffraction measurements is a collinear antiferromagnetic arrangement of Mn(2+) ions in the Mn2O9 dimeric unit and Ni(2+) ions in the zigzag chain.
Division of Chemistry, Graduate School of Science, Hokkaido University , Sapporo 060-0810, Japan.
Yoshihiro
Y
Doi
Division of Chemistry, Graduate School of Science, Hokkaido University , Sapporo 060-0810, Japan.
Ryo
R
Suzuki
Division of Chemistry, Graduate School of Science, Hokkaido University , Sapporo 060-0810, Japan.
Yukio
Y
Hinatsu
Quantum Beam Science Directorate, Japan Atomic Energy Agency , Tokai, Ibaraki 319-1195, Japan.
Katsuaki
K
Kodama
Quantum Beam Science Directorate, Japan Atomic Energy Agency , Tokai, Ibaraki 319-1195, Japan.
Naoki
N
Igawa