TY - JOUR
T1 - New Hg based oxycarbonate superconductor HgBa2Sr2Cu2O6+δ(CO3)
AU - Uehara, M.
AU - Sahoda, S.
AU - Nakata, H.
AU - Akimitsu, J.
AU - Matsui, Y.
N1 - Funding Information:
This work was partly supported by a Grant in Aids Scientific Research from the Ministry of Education, Science and Culture, Japan, and by the Research Institute of Aoyama-Gakuin University.
PY - 1994/3/10
Y1 - 1994/3/10
N2 - A new Hg based oxycarbonate superconductor HgBa2Sr2Cu2O6+δ(CO3) has been found by resistivity and magnetization measurements. The superconductivity has been observed at 66 K by magnetization measurement. The electron-diffraction and HRTEM studies show that the crystal structure basically consisted of [HgBa2O2+δ] and [Sr2CO3] block layers and has a tetragonal unit cell, with a=3.88 A ̊, c=16.94 A ̊, with an orthorhombic superstructure, with A≈4.5√2a=24.71 A ̊,B≈√2a=5.49 A ̊, C=c=16.94 A ̊, due to the three times periodic replacements of a CO3 block for HgOδ in the same c-planes or to a c/2 shift approximately at intervals of three tetragonal cells along the (110) direction. The crystal structure of this compound is described by the following combination: [(Hg0.5C0.5)(Ba,Sr)2O2.5+δ]+CuO2+[(Ba,Sr)2(C0.5Hg0.5)O2.5+δ]+CuO2.
AB - A new Hg based oxycarbonate superconductor HgBa2Sr2Cu2O6+δ(CO3) has been found by resistivity and magnetization measurements. The superconductivity has been observed at 66 K by magnetization measurement. The electron-diffraction and HRTEM studies show that the crystal structure basically consisted of [HgBa2O2+δ] and [Sr2CO3] block layers and has a tetragonal unit cell, with a=3.88 A ̊, c=16.94 A ̊, with an orthorhombic superstructure, with A≈4.5√2a=24.71 A ̊,B≈√2a=5.49 A ̊, C=c=16.94 A ̊, due to the three times periodic replacements of a CO3 block for HgOδ in the same c-planes or to a c/2 shift approximately at intervals of three tetragonal cells along the (110) direction. The crystal structure of this compound is described by the following combination: [(Hg0.5C0.5)(Ba,Sr)2O2.5+δ]+CuO2+[(Ba,Sr)2(C0.5Hg0.5)O2.5+δ]+CuO2.
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U2 - 10.1016/0921-4534(94)90110-4
DO - 10.1016/0921-4534(94)90110-4
M3 - Article
AN - SCOPUS:0028391913
VL - 222
SP - 27
EP - 32
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
SN - 0921-4534
IS - 1-2
ER -