TY - JOUR
T1 - A new iron pnictide oxide (Fe2As2)(Ca5(Mg, Ti)4Oy) and a new phase in the Fe-As-Ca-Mg-Ti-O system
AU - Ogino, Hiraku
AU - Shimizu, Yasuaki
AU - Kawaguchi, Naoto
AU - Kishio, Kohji
AU - Shimoyama, Jun Ichi
AU - Tohei, Tetsuya
AU - Ikuhara, Yuichi
PY - 2011/8
Y1 - 2011/8
N2 - A new layered iron arsenide oxide (Fe2As2)(Ca 5(Mg, Ti)4Oy) and its structural derivative were found in the Fe-As-Ca-Mg-Ti-O system. The crystal structure of (Fe 2As2)(Ca5(Mg, Ti)4Oy) is identical to that of (Fe2As2)(Ca5(Sc, Ti) 4Oy), which was reported in our previous study. The lattice constants of this compound are a = 3.86(4) and c = 41.05(2). In addition, another phase with a thicker blocking layer was found. The structure of the compound was tentatively assigned through scanning transmission electron microscope observation as (Fe2As2)(Ca8(Mg, Ti)6Oy) with sextuple perovskite-type sheets divided by a rock salt layer. The interlayer Fe-Fe distance of this compound is ∼ 30. These compounds exhibited bulk superconductivity, as found from magnetization and resistivity measurements.
AB - A new layered iron arsenide oxide (Fe2As2)(Ca 5(Mg, Ti)4Oy) and its structural derivative were found in the Fe-As-Ca-Mg-Ti-O system. The crystal structure of (Fe 2As2)(Ca5(Mg, Ti)4Oy) is identical to that of (Fe2As2)(Ca5(Sc, Ti) 4Oy), which was reported in our previous study. The lattice constants of this compound are a = 3.86(4) and c = 41.05(2). In addition, another phase with a thicker blocking layer was found. The structure of the compound was tentatively assigned through scanning transmission electron microscope observation as (Fe2As2)(Ca8(Mg, Ti)6Oy) with sextuple perovskite-type sheets divided by a rock salt layer. The interlayer Fe-Fe distance of this compound is ∼ 30. These compounds exhibited bulk superconductivity, as found from magnetization and resistivity measurements.
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U2 - 10.1088/0953-2048/24/8/085020
DO - 10.1088/0953-2048/24/8/085020
M3 - Article
AN - SCOPUS:79961095234
VL - 24
JO - Superconductor Science and Technology
JF - Superconductor Science and Technology
SN - 0953-2048
IS - 8
M1 - 085020
ER -