Superconductivity in the indium-doped Tl-1223 phase: (Tl0.8In0.2)(Sr0.8Ba0.2) 2Ca2Cu3O9-δ

N. H. Hur; M. Paranthaman; J. R. Thompson; D. K. Christen

doi:10.1016/0921-4534(96)00416-9

Superconductivity in the indium-doped Tl-1223 phase: (Tl_0.8In_0.2)(Sr_0.8Ba_0.2) ₂Ca₂Cu₃O_9-δ

N. H. Hur, M. Paranthaman, J. R. Thompson, D. K. Christen

Nanomaterials Chemistry Group

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Abstract

We report the synthesis and characterization of a new Tl- and In-based '1223' type cuprate oxide, (Tl_0.8In_0.2)(Sr_0.8Ba_0.2) ₂Ca₂Cu₃O_9-δ (Tl,In-1223). The as-synthesized Tl,In-1223 compound becomes superconducting at about 80 K. The T_c increased to 103 K when the sample was annealed under an argon atmosphere. Magnetization studies on polycrystalline samples of Tl,In-1223 reveal that persistent current densities (J_p) of the indium-doped compound are about 10 times smaller than those of corresponding Tl,Bi-1223 and Tl,Pb-1223 with the same structure type. Small substitution of In for Tl in Tl-1223 results in a large reduction of T_c and J_p. A slight change in the electronic configurations of the rock-salt metal sites appears to affect the delicate balance of the metal and oxygen energy levels, which leads to the virtual changes in the superconductivity in Tl,In-1223.

Original language	English
Pages (from-to)	266-270
Number of pages	5
Journal	Physica C: Superconductivity and its Applications
Volume	268
Issue number	3-4
DOIs	https://doi.org/10.1016/0921-4534(96)00416-9
State	Published - Sep 10 1996

Funding

We are grateful to Ms. Nancy Delene for her assistance. The research at ORNL was sponsored by U.S. Department of Energy under contract DE-AC-05-96OR22464. One of us (N.H.H.) also thanks KOSEF (Korea Science and Engineering Foundation) for financial support.

Funders	Funder number
U.S. Department of Energy	DE-AC-05-96OR22464
Korea Science and Engineering Foundation

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title = "Superconductivity in the indium-doped Tl-1223 phase: (Tl0.8In0.2)(Sr0.8Ba0.2) 2Ca2Cu3O9-δ",

abstract = "We report the synthesis and characterization of a new Tl- and In-based '1223' type cuprate oxide, (Tl0.8In0.2)(Sr0.8Ba0.2) 2Ca2Cu3O9-δ (Tl,In-1223). The as-synthesized Tl,In-1223 compound becomes superconducting at about 80 K. The Tc increased to 103 K when the sample was annealed under an argon atmosphere. Magnetization studies on polycrystalline samples of Tl,In-1223 reveal that persistent current densities (Jp) of the indium-doped compound are about 10 times smaller than those of corresponding Tl,Bi-1223 and Tl,Pb-1223 with the same structure type. Small substitution of In for Tl in Tl-1223 results in a large reduction of Tc and Jp. A slight change in the electronic configurations of the rock-salt metal sites appears to affect the delicate balance of the metal and oxygen energy levels, which leads to the virtual changes in the superconductivity in Tl,In-1223.",

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T2 - (Tl0.8In0.2)(Sr0.8Ba0.2) 2Ca2Cu3O9-δ

AU - Hur, N. H.

AU - Paranthaman, M.

AU - Thompson, J. R.

AU - Christen, D. K.

PY - 1996/9/10

Y1 - 1996/9/10

N2 - We report the synthesis and characterization of a new Tl- and In-based '1223' type cuprate oxide, (Tl0.8In0.2)(Sr0.8Ba0.2) 2Ca2Cu3O9-δ (Tl,In-1223). The as-synthesized Tl,In-1223 compound becomes superconducting at about 80 K. The Tc increased to 103 K when the sample was annealed under an argon atmosphere. Magnetization studies on polycrystalline samples of Tl,In-1223 reveal that persistent current densities (Jp) of the indium-doped compound are about 10 times smaller than those of corresponding Tl,Bi-1223 and Tl,Pb-1223 with the same structure type. Small substitution of In for Tl in Tl-1223 results in a large reduction of Tc and Jp. A slight change in the electronic configurations of the rock-salt metal sites appears to affect the delicate balance of the metal and oxygen energy levels, which leads to the virtual changes in the superconductivity in Tl,In-1223.

AB - We report the synthesis and characterization of a new Tl- and In-based '1223' type cuprate oxide, (Tl0.8In0.2)(Sr0.8Ba0.2) 2Ca2Cu3O9-δ (Tl,In-1223). The as-synthesized Tl,In-1223 compound becomes superconducting at about 80 K. The Tc increased to 103 K when the sample was annealed under an argon atmosphere. Magnetization studies on polycrystalline samples of Tl,In-1223 reveal that persistent current densities (Jp) of the indium-doped compound are about 10 times smaller than those of corresponding Tl,Bi-1223 and Tl,Pb-1223 with the same structure type. Small substitution of In for Tl in Tl-1223 results in a large reduction of Tc and Jp. A slight change in the electronic configurations of the rock-salt metal sites appears to affect the delicate balance of the metal and oxygen energy levels, which leads to the virtual changes in the superconductivity in Tl,In-1223.

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JO - Physica C: Superconductivity and its Applications

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Superconductivity in the indium-doped Tl-1223 phase: (Tl_0.8In_0.2)(Sr_0.8Ba_0.2) ₂Ca₂Cu₃O_9-δ

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