Structure and properties of a metallic, cubic thallium-doped barium cuprate

Z. Iqbal; B. L. Ramakrishna; F. Reidlinger; H. Eckhardt; J. C. Barry

doi:10.1016/0921-4534(89)90901-5

Structure and properties of a metallic, cubic thallium-doped barium cuprate

Z. Iqbal, B. L. Ramakrishna, F. Reidlinger, H. Eckhardt, J. C. Barry

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

Abstract

A cubic (a=18.2886 A ̊) thallium-doped barium cuprate of composition Ba_1-xTl_xCuO_2+y, where x=0.1-0.15 and y=0.12, in which Ba(II) sites are doped by Tl(I,III), has been synthesized. A full x-ray structure refinement has been performed on a single crystal isolated from a ceramic preparation. Typical ceramic preparations show metallic behaviour and zero resistance between 25 and 35K. However, since Meissner fractions range from 1 to 3%, the superconductivity is probably associated with a grain boundary region where either intergrowth of the layered Tl₂Ba₂CuO₆ phase or optimal Tl and concomitant oxygen doping occurs. K-doping of the barium cuprate phase and Tl-doping of a related Ba₂Cu₃O₅ phase are also briefly discussed.

Original language	English (US)
Pages (from-to)	29-30
Number of pages	2
Journal	Physica C: Superconductivity and its applications
Volume	162-164
Issue number	PART 1
DOIs	https://doi.org/10.1016/0921-4534(89)90901-5
State	Published - Dec 1989
Externally published	Yes

All Science Journal Classification (ASJC) codes

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

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10.1016/0921-4534(89)90901-5

Cite this

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title = "Structure and properties of a metallic, cubic thallium-doped barium cuprate",

abstract = "A cubic (a=18.2886 A ̊) thallium-doped barium cuprate of composition Ba1-xTlxCuO2+y, where x=0.1-0.15 and y=0.12, in which Ba(II) sites are doped by Tl(I,III), has been synthesized. A full x-ray structure refinement has been performed on a single crystal isolated from a ceramic preparation. Typical ceramic preparations show metallic behaviour and zero resistance between 25 and 35K. However, since Meissner fractions range from 1 to 3%, the superconductivity is probably associated with a grain boundary region where either intergrowth of the layered Tl2Ba2CuO6 phase or optimal Tl and concomitant oxygen doping occurs. K-doping of the barium cuprate phase and Tl-doping of a related Ba2Cu3O5 phase are also briefly discussed.",

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AU - Iqbal, Z.

AU - Ramakrishna, B. L.

AU - Reidlinger, F.

AU - Eckhardt, H.

AU - Barry, J. C.

PY - 1989/12

Y1 - 1989/12

N2 - A cubic (a=18.2886 A ̊) thallium-doped barium cuprate of composition Ba1-xTlxCuO2+y, where x=0.1-0.15 and y=0.12, in which Ba(II) sites are doped by Tl(I,III), has been synthesized. A full x-ray structure refinement has been performed on a single crystal isolated from a ceramic preparation. Typical ceramic preparations show metallic behaviour and zero resistance between 25 and 35K. However, since Meissner fractions range from 1 to 3%, the superconductivity is probably associated with a grain boundary region where either intergrowth of the layered Tl2Ba2CuO6 phase or optimal Tl and concomitant oxygen doping occurs. K-doping of the barium cuprate phase and Tl-doping of a related Ba2Cu3O5 phase are also briefly discussed.

AB - A cubic (a=18.2886 A ̊) thallium-doped barium cuprate of composition Ba1-xTlxCuO2+y, where x=0.1-0.15 and y=0.12, in which Ba(II) sites are doped by Tl(I,III), has been synthesized. A full x-ray structure refinement has been performed on a single crystal isolated from a ceramic preparation. Typical ceramic preparations show metallic behaviour and zero resistance between 25 and 35K. However, since Meissner fractions range from 1 to 3%, the superconductivity is probably associated with a grain boundary region where either intergrowth of the layered Tl2Ba2CuO6 phase or optimal Tl and concomitant oxygen doping occurs. K-doping of the barium cuprate phase and Tl-doping of a related Ba2Cu3O5 phase are also briefly discussed.

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ER -

Structure and properties of a metallic, cubic thallium-doped barium cuprate

Abstract

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