Superconducting YBa2Cu3O7-x based edge junctions with Y0.1Ca0.3Ba2Cu3O7-x barriers

Q. X. Jia; D. Reagor; S. R. Foltyn; M. Hawley; C. Mombourquette; K. N. Springer; X. D. Wu

doi:10.1016/0921-4534(94)90187-2

Superconducting YBa₂Cu₃O_7-x based edge junctions with Y_0.1Ca_0.3Ba₂Cu₃O_7-x barriers

Q. X. Jia
, D. Reagor
, S. R. Foltyn
, M. Hawley
, C. Mombourquette
, K. N. Springer
, X. D. Wu

Department of Materials Design and Innovation

Los Alamos National Laboratory

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

17 Scopus citations

Abstract

High-temperature superconductor YBa₂cU₃O_7-x (YBCO) Josephson junctions were fabricated in an edge junction geometry using Y_0.7Ca_0.3Ba₂O_7-x as a barrier material. The films were deposited by pulsed-laser deposition and patterned by argon ion milling. The edge morphology of the bottom electrode after ion milling was investigated by atomic force microscopy. The yield of devices in terms of supercurrent continuity is nearly 100%. Critical current densities exceeding 10⁶ A/cm² at 75 K were obtained through crossovers of YBCO/YBCO under our processing conditions. Resistively shunted junction current-voltage characteristics and microwave-induced Shapiro steps were observed in a wide temperature range from 75 K to 84 K for the junctions.

Original language	English
Pages (from-to)	160-164
Number of pages	5
Journal	Physica C: Superconductivity and its Applications
Volume	228
Issue number	1-2
DOIs	https://doi.org/10.1016/0921-4534(94)90187-2
State	Published - Jul 10 1994

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title = "Superconducting YBa2Cu3O7-x based edge junctions with Y0.1Ca0.3Ba2Cu3O7-x barriers",

abstract = "High-temperature superconductor YBa2cU3O7-x (YBCO) Josephson junctions were fabricated in an edge junction geometry using Y0.7Ca0.3Ba2O7-x as a barrier material. The films were deposited by pulsed-laser deposition and patterned by argon ion milling. The edge morphology of the bottom electrode after ion milling was investigated by atomic force microscopy. The yield of devices in terms of supercurrent continuity is nearly 100\%. Critical current densities exceeding 106 A/cm2 at 75 K were obtained through crossovers of YBCO/YBCO under our processing conditions. Resistively shunted junction current-voltage characteristics and microwave-induced Shapiro steps were observed in a wide temperature range from 75 K to 84 K for the junctions.",

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year = "1994",

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doi = "10.1016/0921-4534(94)90187-2",

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T1 - Superconducting YBa2Cu3O7-x based edge junctions with Y0.1Ca0.3Ba2Cu3O7-x barriers

AU - Jia, Q. X.

AU - Reagor, D.

AU - Foltyn, S. R.

AU - Hawley, M.

AU - Mombourquette, C.

AU - Springer, K. N.

AU - Wu, X. D.

PY - 1994/7/10

Y1 - 1994/7/10

N2 - High-temperature superconductor YBa2cU3O7-x (YBCO) Josephson junctions were fabricated in an edge junction geometry using Y0.7Ca0.3Ba2O7-x as a barrier material. The films were deposited by pulsed-laser deposition and patterned by argon ion milling. The edge morphology of the bottom electrode after ion milling was investigated by atomic force microscopy. The yield of devices in terms of supercurrent continuity is nearly 100%. Critical current densities exceeding 106 A/cm2 at 75 K were obtained through crossovers of YBCO/YBCO under our processing conditions. Resistively shunted junction current-voltage characteristics and microwave-induced Shapiro steps were observed in a wide temperature range from 75 K to 84 K for the junctions.

AB - High-temperature superconductor YBa2cU3O7-x (YBCO) Josephson junctions were fabricated in an edge junction geometry using Y0.7Ca0.3Ba2O7-x as a barrier material. The films were deposited by pulsed-laser deposition and patterned by argon ion milling. The edge morphology of the bottom electrode after ion milling was investigated by atomic force microscopy. The yield of devices in terms of supercurrent continuity is nearly 100%. Critical current densities exceeding 106 A/cm2 at 75 K were obtained through crossovers of YBCO/YBCO under our processing conditions. Resistively shunted junction current-voltage characteristics and microwave-induced Shapiro steps were observed in a wide temperature range from 75 K to 84 K for the junctions.

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U2 - 10.1016/0921-4534(94)90187-2

DO - 10.1016/0921-4534(94)90187-2

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VL - 228

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JO - Physica C: Superconductivity and its Applications

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IS - 1-2

ER -

Superconducting YBa₂Cu₃O_7-x based edge junctions with Y_0.1Ca_0.3Ba₂Cu₃O_7-x barriers

Abstract

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