Effect of disorder on the electrical and superconducting properties in Ln1.2Ba1.2Ca0.6Cu3O 7+δ (Ln = La, Nd, Sm) and La1.2-xNd xBa1.2Ca0.6Cu3O7+δ

S. L. Samal; S. E. Lofland; K. V. Ramanujachary; N. Sarkar; S. Ghosh; A. K. Ganguli

doi:10.1088/0953-2048/21/8/085007

Effect of disorder on the electrical and superconducting properties in Ln_1.2Ba_1.2Ca_0.6Cu₃O _7+δ (Ln = La, Nd, Sm) and La_1.2-xNd _xBa_1.2Ca_0.6Cu₃O_7+δ

S. L. Samal
, S. E. Lofland
, K. V. Ramanujachary
, N. Sarkar
, S. Ghosh
, A. K. Ganguli

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

1 Scopus citations

Abstract

The effect of disorder on the suppression of superconductivity has been studied in two series of high temperature superconducting oxides of the type Ln_1.2Ba_1.2Ca_0.6Cu₃O _7+δ (Ln = La, Nd, Sm) and La_1.2-xNd _xBa_1.2Ca_0.6Cu₃O_7+δ (x = 0.3, 0.6, 0.9). These oxides crystallize in the tetragonal structure related to the 1113-type superconductors. It has been shown that considerable cation disorder exists at the Ln and Ba crystallographic sites in these oxides. Furthermore, it has been shown that Ln and Ca ions occupy both the 1d- and the 2h-crystallographic sites whereas Ba ions only occupy the 2h-crystallographic site. La_1.2Ba_1.2Ca_0.6Cu₃O _7+δ shows a superconducting transition with T_c of 65 K while the Sm analog shows semiconducting behavior. A broad metal-semiconductor transition is observed in Nd_1.2Ba _1.2Ca_0.6Cu₃O_7+δ. It has also been shown that the gradual suppression of T_c in La _1.2-xNd_xBa_1.2Ca_0.6Cu ₃O_7+δ, as x increases, is related to disorder which could be related to the variance (σ²) of the average ionic radii of the ions at the 2h site.

Original language	English (US)
Article number	085007
Journal	Superconductor Science and Technology
Volume	21
Issue number	8
DOIs	https://doi.org/10.1088/0953-2048/21/8/085007
State	Published - Aug 1 2008

All Science Journal Classification (ASJC) codes

Ceramics and Composites
Condensed Matter Physics
Metals and Alloys
Electrical and Electronic Engineering
Materials Chemistry

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10.1088/0953-2048/21/8/085007

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title = "Effect of disorder on the electrical and superconducting properties in Ln1.2Ba1.2Ca0.6Cu3O 7+δ (Ln = La, Nd, Sm) and La1.2-xNd xBa1.2Ca0.6Cu3O7+δ",

abstract = "The effect of disorder on the suppression of superconductivity has been studied in two series of high temperature superconducting oxides of the type Ln1.2Ba1.2Ca0.6Cu3O 7+δ (Ln = La, Nd, Sm) and La1.2-xNd xBa1.2Ca0.6Cu3O7+δ (x = 0.3, 0.6, 0.9). These oxides crystallize in the tetragonal structure related to the 1113-type superconductors. It has been shown that considerable cation disorder exists at the Ln and Ba crystallographic sites in these oxides. Furthermore, it has been shown that Ln and Ca ions occupy both the 1d- and the 2h-crystallographic sites whereas Ba ions only occupy the 2h-crystallographic site. La1.2Ba1.2Ca0.6Cu3O 7+δ shows a superconducting transition with Tc of 65 K while the Sm analog shows semiconducting behavior. A broad metal-semiconductor transition is observed in Nd1.2Ba 1.2Ca0.6Cu3O7+δ. It has also been shown that the gradual suppression of Tc in La 1.2-xNdxBa1.2Ca0.6Cu 3O7+δ, as x increases, is related to disorder which could be related to the variance (σ2) of the average ionic radii of the ions at the 2h site.",

author = "Samal, \{S. L.\} and Lofland, \{S. E.\} and Ramanujachary, \{K. V.\} and N. Sarkar and S. Ghosh and Ganguli, \{A. K.\}",

year = "2008",

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doi = "10.1088/0953-2048/21/8/085007",

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T1 - Effect of disorder on the electrical and superconducting properties in Ln1.2Ba1.2Ca0.6Cu3O 7+δ (Ln = La, Nd, Sm) and La1.2-xNd xBa1.2Ca0.6Cu3O7+δ

AU - Samal, S. L.

AU - Lofland, S. E.

AU - Ramanujachary, K. V.

AU - Sarkar, N.

AU - Ghosh, S.

AU - Ganguli, A. K.

PY - 2008/8/1

Y1 - 2008/8/1

N2 - The effect of disorder on the suppression of superconductivity has been studied in two series of high temperature superconducting oxides of the type Ln1.2Ba1.2Ca0.6Cu3O 7+δ (Ln = La, Nd, Sm) and La1.2-xNd xBa1.2Ca0.6Cu3O7+δ (x = 0.3, 0.6, 0.9). These oxides crystallize in the tetragonal structure related to the 1113-type superconductors. It has been shown that considerable cation disorder exists at the Ln and Ba crystallographic sites in these oxides. Furthermore, it has been shown that Ln and Ca ions occupy both the 1d- and the 2h-crystallographic sites whereas Ba ions only occupy the 2h-crystallographic site. La1.2Ba1.2Ca0.6Cu3O 7+δ shows a superconducting transition with Tc of 65 K while the Sm analog shows semiconducting behavior. A broad metal-semiconductor transition is observed in Nd1.2Ba 1.2Ca0.6Cu3O7+δ. It has also been shown that the gradual suppression of Tc in La 1.2-xNdxBa1.2Ca0.6Cu 3O7+δ, as x increases, is related to disorder which could be related to the variance (σ2) of the average ionic radii of the ions at the 2h site.

AB - The effect of disorder on the suppression of superconductivity has been studied in two series of high temperature superconducting oxides of the type Ln1.2Ba1.2Ca0.6Cu3O 7+δ (Ln = La, Nd, Sm) and La1.2-xNd xBa1.2Ca0.6Cu3O7+δ (x = 0.3, 0.6, 0.9). These oxides crystallize in the tetragonal structure related to the 1113-type superconductors. It has been shown that considerable cation disorder exists at the Ln and Ba crystallographic sites in these oxides. Furthermore, it has been shown that Ln and Ca ions occupy both the 1d- and the 2h-crystallographic sites whereas Ba ions only occupy the 2h-crystallographic site. La1.2Ba1.2Ca0.6Cu3O 7+δ shows a superconducting transition with Tc of 65 K while the Sm analog shows semiconducting behavior. A broad metal-semiconductor transition is observed in Nd1.2Ba 1.2Ca0.6Cu3O7+δ. It has also been shown that the gradual suppression of Tc in La 1.2-xNdxBa1.2Ca0.6Cu 3O7+δ, as x increases, is related to disorder which could be related to the variance (σ2) of the average ionic radii of the ions at the 2h site.

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Effect of disorder on the electrical and superconducting properties in Ln_1.2Ba_1.2Ca_0.6Cu₃O _7+δ (Ln = La, Nd, Sm) and La_1.2-xNd _xBa_1.2Ca_0.6Cu₃O_7+δ

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