TY - JOUR
T1 - Synthesis, crystal structures, and magnetic properties of new 12L-perovskites Ba4LnRu3O12 (Ln = lanthanides)
AU - Shimoda, Yuki
AU - Doi, Yoshihiro
AU - Hinatsu, Yukio
AU - Ohoyama, Kenji
PY - 2008/7/8
Y1 - 2008/7/8
N2 - Synthesis, crystal structures, and magnetic properties of new quaternary oxides Ba4LnRu3O12 (Ln = lanthanides) were investigated. From the powder X-ray and neutron diffraction measurements, it is found that they adopt the 12L-perovskite-type structures consisting of Ru 3O12 trimers and LnO6 octahedra. The Ba 4LnRu3O12 for Ln = Tb-Lu have a hexagonal unit cell with the space group R3̄m, while those for Ln = La-Nd, Sm-Gd have a monoclinically distorted cell with C2/m. Only for Ln = Ce, Pr, and Tb compounds, the Ln ions are in the tetravalent state. The magnetic properties of these three compounds were investigated. For Ba4CeRu3O 12, no magnetic transition was observed down to 0.5 K. The Ba 4PrRu3012 and Ba4TbRu 3O12 show an antiferromagnetic transition at 2.4 and 24 K, respectively. The magnetic structure for Ba4TbRu3O 12 was determined by powder neutron diffraction measurements at low temperatures, which indicates the long-range antiferromagnetic ordering.
AB - Synthesis, crystal structures, and magnetic properties of new quaternary oxides Ba4LnRu3O12 (Ln = lanthanides) were investigated. From the powder X-ray and neutron diffraction measurements, it is found that they adopt the 12L-perovskite-type structures consisting of Ru 3O12 trimers and LnO6 octahedra. The Ba 4LnRu3O12 for Ln = Tb-Lu have a hexagonal unit cell with the space group R3̄m, while those for Ln = La-Nd, Sm-Gd have a monoclinically distorted cell with C2/m. Only for Ln = Ce, Pr, and Tb compounds, the Ln ions are in the tetravalent state. The magnetic properties of these three compounds were investigated. For Ba4CeRu3O 12, no magnetic transition was observed down to 0.5 K. The Ba 4PrRu3012 and Ba4TbRu 3O12 show an antiferromagnetic transition at 2.4 and 24 K, respectively. The magnetic structure for Ba4TbRu3O 12 was determined by powder neutron diffraction measurements at low temperatures, which indicates the long-range antiferromagnetic ordering.
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U2 - 10.1021/cm800708g
DO - 10.1021/cm800708g
M3 - Article
AN - SCOPUS:47749123833
VL - 20
SP - 4512
EP - 4518
JO - Chemistry of Materials
JF - Chemistry of Materials
SN - 0897-4756
IS - 13
ER -