Structure evolution in superconducting (Hg0.7,Tl0.3)2Ba2(Ca x,Y1-x)Cu2O8-2δ

X. J. Wu; A. Tokiwa-Yamamoto; T. Tatsuki; S. Adachi; K. Tanabe

doi:10.1016/S0921-4534(96)00620-X

Structure evolution in superconducting (Hg_0.7,Tl_0.3)₂Ba₂(Ca _x,Y_1-x)Cu₂O_8-2δ

X. J. Wu, A. Tokiwa-Yamamoto, T. Tatsuki, S. Adachi, K. Tanabe

Research output: Contribution to journal › Article › peer-review

9 Citations (Scopus)

Abstract

Nearly single-phase superconducting (Hg_0.7,Tl_0.3)₂Ba₂(Ca _x,Y_1-x)Cu₂O_8-2δ 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.

Original language	English
Pages (from-to)	198-204
Number of pages	7
Journal	Physica C: Superconductivity and its applications
Volume	273
Issue number	3-4
DOIs	https://doi.org/10.1016/S0921-4534(96)00620-X
Publication status	Published - 1997 Jan 1
Externally published	Yes

Keywords

(Hg,Tl)-2212 phase
HRTEM image
Structure evolution
X-ray Rietveld refinement

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

Access to Document

10.1016/S0921-4534(96)00620-X

Cite this

@article{6b6d07d2196846e9993abcfacb18e7bc,

title = "Structure evolution in superconducting (Hg0.7,Tl0.3)2Ba2(Ca x,Y1-x)Cu2O8-2δ",

abstract = "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 {\AA}. 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.",

keywords = "(Hg,Tl)-2212 phase, HRTEM image, Structure evolution, X-ray Rietveld refinement",

author = "Wu, {X. J.} and A. Tokiwa-Yamamoto and T. Tatsuki and S. Adachi and K. Tanabe",

note = "Funding Information: This work was supported by the NEDO for the R&D of Industrial Science and Technology Frontier Program.",

year = "1997",

month = jan,

day = "1",

doi = "10.1016/S0921-4534(96)00620-X",

language = "English",

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pages = "198--204",

journal = "Physica C: Superconductivity and its Applications",

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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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