Superconductivity in the LnBaCuO system (Ln = Y, Ho, Er)

E. A. Hayri; K. V. Ramanujachary; S. Li; M. Greenblatt; S. Simizu; S. A. Friedberg

doi:10.1016/0038-1098(87)91158-6

Superconductivity in the LnBaCuO system (Ln = Y, Ho, Er)

E. A. Hayri, K. V. Ramanujachary, S. Li, M. Greenblatt, S. Simizu, S. A. Friedberg

Chemistry

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

5 Scopus citations

Abstract

Superconductivity around 90K is observed in mixed and single phase system of LnBaCuO (Ln = Y, Ho, Er). Resistivity, X-ray powder diffraction and AC susceptibility measurements were carried out on samples of the mixed phase systems Ln_2-xBa_xCuO_4-y (Ln = Ho, Er), Y_1.2Ba_0.8Cu_1+xO_4+x-y(0<x<5) and single phase system Ba₂LnCu₃O₇ (Ln = Y, Ho, Er). Ln_2-xBa_xCuO_4-y consists of Ba₂LnCu₃O₇, BaCuLn₂O₅, Cu₂Ln₂O₅ and starting materials and shows a small diamagnetic signal below T_c in the temperature dependent AC susceptibility. Y_1.2Ba_0.8Cu_1+xO_4+x-y is a mixture of Ba₂YCu₃O₇, BaCuY₂O₅ and CuO and also indicates a small diamagnetic signal at 92K. Interesting resistivity anomalies occur in the Y_1.2Ba_0.8Cu₄O_7-y and Ho_0.8Ba_1.2CuO_4-y composites including large drops in the resistivity at ∼220 and ∼120K, respectively. The pure compounds, Ba₂LnCu₃O₇ (Ln = Y, Ho, Er) show sharp resistive superconducting transitions and bulk Meissner effects of 90%.

Original language	English (US)
Pages (from-to)	217-226
Number of pages	10
Journal	Solid State Communications
Volume	64
Issue number	2
DOIs	https://doi.org/10.1016/0038-1098(87)91158-6
State	Published - Oct 1987

All Science Journal Classification (ASJC) codes

Chemistry(all)
Condensed Matter Physics
Materials Chemistry

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@article{395ec5d1e9a54221ae575709f853c62f,

title = "Superconductivity in the LnBaCuO system (Ln = Y, Ho, Er)",

abstract = "Superconductivity around 90K is observed in mixed and single phase system of LnBaCuO (Ln = Y, Ho, Er). Resistivity, X-ray powder diffraction and AC susceptibility measurements were carried out on samples of the mixed phase systems Ln2-xBaxCuO4-y (Ln = Ho, Er), Y1.2Ba0.8Cu1+xO4+x-y(02LnCu3O7 (Ln = Y, Ho, Er). Ln2-xBaxCuO4-y consists of Ba2LnCu3O7, BaCuLn2O5, Cu2Ln2O5 and starting materials and shows a small diamagnetic signal below Tc in the temperature dependent AC susceptibility. Y1.2Ba0.8Cu1+xO4+x-y is a mixture of Ba2YCu3O7, BaCuY2O5 and CuO and also indicates a small diamagnetic signal at 92K. Interesting resistivity anomalies occur in the Y1.2Ba0.8Cu4O7-y and Ho0.8Ba1.2CuO4-y composites including large drops in the resistivity at ∼220 and ∼120K, respectively. The pure compounds, Ba2LnCu3O7 (Ln = Y, Ho, Er) show sharp resistive superconducting transitions and bulk Meissner effects of 90%.",

author = "Hayri, {E. A.} and Ramanujachary, {K. V.} and S. Li and M. Greenblatt and S. Simizu and Friedberg, {S. A.}",

year = "1987",

month = oct,

doi = "10.1016/0038-1098(87)91158-6",

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journal = "Solid State Communications",

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T1 - Superconductivity in the LnBaCuO system (Ln = Y, Ho, Er)

AU - Hayri, E. A.

AU - Ramanujachary, K. V.

AU - Li, S.

AU - Greenblatt, M.

AU - Simizu, S.

AU - Friedberg, S. A.

PY - 1987/10

Y1 - 1987/10

N2 - Superconductivity around 90K is observed in mixed and single phase system of LnBaCuO (Ln = Y, Ho, Er). Resistivity, X-ray powder diffraction and AC susceptibility measurements were carried out on samples of the mixed phase systems Ln2-xBaxCuO4-y (Ln = Ho, Er), Y1.2Ba0.8Cu1+xO4+x-y(02LnCu3O7 (Ln = Y, Ho, Er). Ln2-xBaxCuO4-y consists of Ba2LnCu3O7, BaCuLn2O5, Cu2Ln2O5 and starting materials and shows a small diamagnetic signal below Tc in the temperature dependent AC susceptibility. Y1.2Ba0.8Cu1+xO4+x-y is a mixture of Ba2YCu3O7, BaCuY2O5 and CuO and also indicates a small diamagnetic signal at 92K. Interesting resistivity anomalies occur in the Y1.2Ba0.8Cu4O7-y and Ho0.8Ba1.2CuO4-y composites including large drops in the resistivity at ∼220 and ∼120K, respectively. The pure compounds, Ba2LnCu3O7 (Ln = Y, Ho, Er) show sharp resistive superconducting transitions and bulk Meissner effects of 90%.

AB - Superconductivity around 90K is observed in mixed and single phase system of LnBaCuO (Ln = Y, Ho, Er). Resistivity, X-ray powder diffraction and AC susceptibility measurements were carried out on samples of the mixed phase systems Ln2-xBaxCuO4-y (Ln = Ho, Er), Y1.2Ba0.8Cu1+xO4+x-y(02LnCu3O7 (Ln = Y, Ho, Er). Ln2-xBaxCuO4-y consists of Ba2LnCu3O7, BaCuLn2O5, Cu2Ln2O5 and starting materials and shows a small diamagnetic signal below Tc in the temperature dependent AC susceptibility. Y1.2Ba0.8Cu1+xO4+x-y is a mixture of Ba2YCu3O7, BaCuY2O5 and CuO and also indicates a small diamagnetic signal at 92K. Interesting resistivity anomalies occur in the Y1.2Ba0.8Cu4O7-y and Ho0.8Ba1.2CuO4-y composites including large drops in the resistivity at ∼220 and ∼120K, respectively. The pure compounds, Ba2LnCu3O7 (Ln = Y, Ho, Er) show sharp resistive superconducting transitions and bulk Meissner effects of 90%.

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