TY - JOUR
T1 - Structure evolution in superconducting (Hg0.7,Tl0.3)2Ba2(Ca x,Y1-x)Cu2O8-2δ
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 the NEDO for the R&D of Industrial Science and Technology Frontier Program.
PY - 1997/1/1
Y1 - 1997/1/1
N2 - Nearly single-phase superconducting (Hg0.7,Tl0.3)2Ba2(Ca x,Y1-x)Cu2O8-2δ samples (x = 0.1, 0.2, 0.4 and 0.6) were prepared by a high pressure synthesis technique. The crystal structure of these samples was determined by X-ray Rietveld refinement. This crystal belongs to a tetragonal system and has a space group of I4/mmm with a ≈ 3.86 and c ≈ 29.0 Å. The unit cell parameter a decreases and c increases with increasing x. The expansion of the c-axis is found to mainly result from the increase in the inter-planar distance between the Ba-Hg planes. The present refinement does not show evidence for the substitution of Cu in the (Hg,Tl) site.
AB - Nearly single-phase superconducting (Hg0.7,Tl0.3)2Ba2(Ca x,Y1-x)Cu2O8-2δ samples (x = 0.1, 0.2, 0.4 and 0.6) were prepared by a high pressure synthesis technique. The crystal structure of these samples was determined by X-ray Rietveld refinement. This crystal belongs to a tetragonal system and has a space group of I4/mmm with a ≈ 3.86 and c ≈ 29.0 Å. The unit cell parameter a decreases and c increases with increasing x. The expansion of the c-axis is found to mainly result from the increase in the inter-planar distance between the Ba-Hg planes. The present refinement does not show evidence for the substitution of Cu in the (Hg,Tl) site.
KW - (Hg,Tl)-2212 phase
KW - HRTEM image
KW - Structure evolution
KW - X-ray Rietveld refinement
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U2 - 10.1016/S0921-4534(96)00620-X
DO - 10.1016/S0921-4534(96)00620-X
M3 - Article
AN - SCOPUS:0030809894
SN - 0921-4534
VL - 273
SP - 198
EP - 204
JO - Physica C: Superconductivity and its applications
JF - Physica C: Superconductivity and its applications
IS - 3-4
ER -