Critical current density enhancement in YBa2Cu3O 7-δ thin films by twin domains of LaAlO3 substrates

Zuxin Ye; Qiang Li; W. D. Si; P. D. Johnson

doi:10.1109/TASC.2005.848705

Critical current density enhancement in YBa₂Cu₃O _7-δ thin films by twin domains of LaAlO₃ substrates

Zuxin Ye
, Qiang Li
, W. D. Si
, P. D. Johnson

Physics and Astronomy

Brookhaven National Laboratory

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

3 Scopus citations

Abstract

Magnetic flux penetration into a 0.2 μm-thick YBa₂Cu ₃O_7-δ (YBCO) thin film grown on a crystalline LaAlO₃ (LAO) substrate was studied using magneto-optical imaging techniques. Enhanced critical current density J_c was observed at the location corresponding to twin domains on the underlying substrate. We attribute this J_c enhancement to increased pinning defects in the YBCO layer induced by the naturally formed nano-scaled surface roughness on the LAO substrate. Our results suggest that the substrate surface roughness might be helpful in J_c improvement of YBCO thin films grown on metal substrates by pulsed laser deposition.

Original language	English
Pages (from-to)	3013-3015
Number of pages	3
Journal	IEEE Transactions on Applied Superconductivity
Volume	15
Issue number	2 PART III
DOIs	https://doi.org/10.1109/TASC.2005.848705
State	Published - Jun 2005

Keywords

Flux pinning
Magneto optical
Superconductor
YBCO

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10.1109/TASC.2005.848705

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title = "Critical current density enhancement in YBa2Cu3O 7-δ thin films by twin domains of LaAlO3 substrates",

abstract = "Magnetic flux penetration into a 0.2 μm-thick YBa2Cu 3O7-δ (YBCO) thin film grown on a crystalline LaAlO3 (LAO) substrate was studied using magneto-optical imaging techniques. Enhanced critical current density Jc was observed at the location corresponding to twin domains on the underlying substrate. We attribute this Jc enhancement to increased pinning defects in the YBCO layer induced by the naturally formed nano-scaled surface roughness on the LAO substrate. Our results suggest that the substrate surface roughness might be helpful in Jc improvement of YBCO thin films grown on metal substrates by pulsed laser deposition.",

keywords = "Flux pinning, Magneto optical, Superconductor, YBCO",

author = "Zuxin Ye and Qiang Li and Si, \{W. D.\} and Johnson, \{P. D.\}",

year = "2005",

month = jun,

doi = "10.1109/TASC.2005.848705",

language = "English",

volume = "15",

pages = "3013--3015",

journal = "IEEE Transactions on Applied Superconductivity",

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T1 - Critical current density enhancement in YBa2Cu3O 7-δ thin films by twin domains of LaAlO3 substrates

AU - Ye, Zuxin

AU - Li, Qiang

AU - Si, W. D.

AU - Johnson, P. D.

PY - 2005/6

Y1 - 2005/6

N2 - Magnetic flux penetration into a 0.2 μm-thick YBa2Cu 3O7-δ (YBCO) thin film grown on a crystalline LaAlO3 (LAO) substrate was studied using magneto-optical imaging techniques. Enhanced critical current density Jc was observed at the location corresponding to twin domains on the underlying substrate. We attribute this Jc enhancement to increased pinning defects in the YBCO layer induced by the naturally formed nano-scaled surface roughness on the LAO substrate. Our results suggest that the substrate surface roughness might be helpful in Jc improvement of YBCO thin films grown on metal substrates by pulsed laser deposition.

AB - Magnetic flux penetration into a 0.2 μm-thick YBa2Cu 3O7-δ (YBCO) thin film grown on a crystalline LaAlO3 (LAO) substrate was studied using magneto-optical imaging techniques. Enhanced critical current density Jc was observed at the location corresponding to twin domains on the underlying substrate. We attribute this Jc enhancement to increased pinning defects in the YBCO layer induced by the naturally formed nano-scaled surface roughness on the LAO substrate. Our results suggest that the substrate surface roughness might be helpful in Jc improvement of YBCO thin films grown on metal substrates by pulsed laser deposition.

KW - Flux pinning

KW - Magneto optical

KW - Superconductor

KW - YBCO

UR - https://www.scopus.com/pages/publications/22144438669

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DO - 10.1109/TASC.2005.848705

M3 - Article

AN - SCOPUS:22144438669

SN - 1051-8223

VL - 15

SP - 3013

EP - 3015

JO - IEEE Transactions on Applied Superconductivity

JF - IEEE Transactions on Applied Superconductivity

IS - 2 PART III

ER -

Critical current density enhancement in YBa₂Cu₃O _7-δ thin films by twin domains of LaAlO₃ substrates

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Keywords

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