TY - JOUR
T1 - Study of structural variation caused by Ar annealing for (Hg0.7,Tl0.3)2Ba2(Ca0.2,Y0.8)Cu2Oy
AU - Wu, X. J.
AU - Tokiwa-Yamamoto, A.
AU - Tatsuki, T.
AU - Adachi, S.
AU - Tanabe, K.
N1 - Funding Information:
This work was supported by New Energy and Industrial Technology Development Organization (NEDO) as a part of its Research and Development of Fundamental Technologies for Superconductor Applications Project under the New Sunshine Program administrated by the Agency of Industrial Science and Technologies MITI of Japan.
Copyright:
Copyright 2017 Elsevier B.V., All rights reserved.
PY - 1999/3/20
Y1 - 1999/3/20
N2 - A nearly single phase (Hg,Tl)-bilayer sample, (Hg0.7,Tl0.3)2Ba2(Ca0.2,Y0.8)Cu2Oy, was synthesized by a high pressure synthesizing technique. The as-sintered sample, which is considered to be underdoped, shows superconductivity at Tc = 65 K. The sample was then annealed in Ar gas at 300 °C for 30 min, 12 h, and 400 °C for 36 h, respectively. The crystal structure of these samples was determined by Rietveld refinement. Both of the a- and c-axes lengths expand with the decrease of hole doping in the crystal. It was found that the interplanar distance between the Ba-(rock salt)-Ba sheets expands, and the interplanar distance between the Ba-(infinite layer)-Ba sheets shrinks with Ar annealing, showing the same variation tendency as found in (Hg,Tl)-2223.
AB - A nearly single phase (Hg,Tl)-bilayer sample, (Hg0.7,Tl0.3)2Ba2(Ca0.2,Y0.8)Cu2Oy, was synthesized by a high pressure synthesizing technique. The as-sintered sample, which is considered to be underdoped, shows superconductivity at Tc = 65 K. The sample was then annealed in Ar gas at 300 °C for 30 min, 12 h, and 400 °C for 36 h, respectively. The crystal structure of these samples was determined by Rietveld refinement. Both of the a- and c-axes lengths expand with the decrease of hole doping in the crystal. It was found that the interplanar distance between the Ba-(rock salt)-Ba sheets expands, and the interplanar distance between the Ba-(infinite layer)-Ba sheets shrinks with Ar annealing, showing the same variation tendency as found in (Hg,Tl)-2223.
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U2 - 10.1016/S0921-4534(99)00172-0
DO - 10.1016/S0921-4534(99)00172-0
M3 - Article
AN - SCOPUS:0032654569
VL - 314
SP - 219
EP - 227
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
SN - 0921-4534
IS - 3
ER -