High quality YBa2Cu3O7 films on polyalumina

L. Ganapathi; S. Giles; Rama Rao; J. P. Zheng; H. S. Kwok

doi:10.1063/1.110430

High quality YBa₂Cu₃O₇ films on polyalumina

L. Ganapathi
, S. Giles
, Rama Rao
, J. P. Zheng
, H. S. Kwok

Department of Electrical Engineering

Excel Superconductor, Inc.
SUNY Buffalo

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

6 Scopus citations

Abstract

Superconducting YBCO (YBa₂Cu₃O₇) films were deposited on polycrystalline alumina substrates with c-normal orientation. YBCO films deposited directly on alumina exhibited a broad transition with T_c, zero=60 K. The T_c, zero increased to 86 K upon the use of a YSZ (yttria stabilized zirconia) buffer layer to stop the interface reaction. However, the J_c of these films was still below 10 ⁴ A/cm². A simple surface modification of the polycrystalline alumina substrate by way of depositing a YSZ buffer and repolishing the surface drastically improved the J_c. Values of 10⁴ A/cm² observed at 30 K is the best J_c reported so far for YBCO films on polycrystalline alumina. We believe further improvements in both the surface finish of the polyalumina and the YSZ buffer layer will lead to microwave quality YBCO films on polyalumina.

Original language	English
Pages (from-to)	2552-2554
Number of pages	3
Journal	Applied Physics Letters
Volume	63
Issue number	18
DOIs	https://doi.org/10.1063/1.110430
State	Published - 1993

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title = "High quality YBa2Cu3O7 films on polyalumina",

abstract = "Superconducting YBCO (YBa2Cu3O7) films were deposited on polycrystalline alumina substrates with c-normal orientation. YBCO films deposited directly on alumina exhibited a broad transition with Tc, zero=60 K. The Tc, zero increased to 86 K upon the use of a YSZ (yttria stabilized zirconia) buffer layer to stop the interface reaction. However, the Jc of these films was still below 10 4 A/cm2. A simple surface modification of the polycrystalline alumina substrate by way of depositing a YSZ buffer and repolishing the surface drastically improved the Jc. Values of 104 A/cm2 observed at 30 K is the best Jc reported so far for YBCO films on polycrystalline alumina. We believe further improvements in both the surface finish of the polyalumina and the YSZ buffer layer will lead to microwave quality YBCO films on polyalumina.",

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T1 - High quality YBa2Cu3O7 films on polyalumina

AU - Ganapathi, L.

AU - Giles, S.

AU - Rao, Rama

AU - Zheng, J. P.

AU - Kwok, H. S.

PY - 1993

Y1 - 1993

N2 - Superconducting YBCO (YBa2Cu3O7) films were deposited on polycrystalline alumina substrates with c-normal orientation. YBCO films deposited directly on alumina exhibited a broad transition with Tc, zero=60 K. The Tc, zero increased to 86 K upon the use of a YSZ (yttria stabilized zirconia) buffer layer to stop the interface reaction. However, the Jc of these films was still below 10 4 A/cm2. A simple surface modification of the polycrystalline alumina substrate by way of depositing a YSZ buffer and repolishing the surface drastically improved the Jc. Values of 104 A/cm2 observed at 30 K is the best Jc reported so far for YBCO films on polycrystalline alumina. We believe further improvements in both the surface finish of the polyalumina and the YSZ buffer layer will lead to microwave quality YBCO films on polyalumina.

AB - Superconducting YBCO (YBa2Cu3O7) films were deposited on polycrystalline alumina substrates with c-normal orientation. YBCO films deposited directly on alumina exhibited a broad transition with Tc, zero=60 K. The Tc, zero increased to 86 K upon the use of a YSZ (yttria stabilized zirconia) buffer layer to stop the interface reaction. However, the Jc of these films was still below 10 4 A/cm2. A simple surface modification of the polycrystalline alumina substrate by way of depositing a YSZ buffer and repolishing the surface drastically improved the Jc. Values of 104 A/cm2 observed at 30 K is the best Jc reported so far for YBCO films on polycrystalline alumina. We believe further improvements in both the surface finish of the polyalumina and the YSZ buffer layer will lead to microwave quality YBCO films on polyalumina.

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DO - 10.1063/1.110430

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JO - Applied Physics Letters

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IS - 18

ER -

High quality YBa₂Cu₃O₇ films on polyalumina

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