High-Jc GdBa2Cu3O7 thin films on SrTiO3 substrates by pulsed laser deposition

S. H. Song; K. P. Ko; R. K. Ko; K. J. Song; S. H. Moon; S. I. Yoo

doi:10.1016/j.physc.2007.04.237

High-J_c GdBa₂Cu₃O₇ thin films on SrTiO₃ substrates by pulsed laser deposition

S. H. Song
, K. P. Ko
, R. K. Ko
, K. J. Song
, S. H. Moon
, S. I. Yoo^*

^*Corresponding author for this work

Physics Education

Seoul National University
Korea Electrotechnology Research Institute
Nano and Advanced Materials Corporation

Research output: Contribution to journal › Journal article › peer-review

12 Scopus citations

Abstract

We investigated the effect of film thickness on the superconducting properties of GdBa₂Cu₃O₇ (GdBCO) films on the SrTiO₃ (STO)(1 0 0) substrates which were fabricated using pulsed laser deposition (PLD) with a KrF exicmer laser (248 nm) pulses of 2.5 J/cm². With the target-to-substrate distance of 6.5 cm, GdBCO films were deposited at the substrate temperature of 810 °C in the oxygen pressure of 400 mTorr. Optimally processed GdBCO samples exhibited T_c of 91.3 K and J_c of 5.2 MA/cm² at 77 K in self field. When the film thickness increased from 0.15 to 2.2 μm, J_c values were decreased from 5.2 to 1.3 MA/cm². It was considered that the J_c reduction with increasing the thickness is attributed to the increase in the average size and density of particulates, leading to decrease in superconducting phase fraction, and also to the formation of cracks, reducing the supercurrent path.

Original language	English
Pages (from-to)	497-500
Number of pages	4
Journal	Physica C: Superconductivity and its Applications
Volume	463-465
Issue number	SUPPL.
DOIs	https://doi.org/10.1016/j.physc.2007.04.237
State	Published - 2007.10.1

Keywords

Critical current density (J)
Critical temperature (T)
GdBCO thin film
Pulsed laser deposition (PLD)

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10.1016/j.physc.2007.04.237

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@article{f61fa40a97c04707a8521146e71bca30,

title = "High-Jc GdBa2Cu3O7 thin films on SrTiO3 substrates by pulsed laser deposition",

abstract = "We investigated the effect of film thickness on the superconducting properties of GdBa2Cu3O7 (GdBCO) films on the SrTiO3 (STO)(1 0 0) substrates which were fabricated using pulsed laser deposition (PLD) with a KrF exicmer laser (248 nm) pulses of 2.5 J/cm2. With the target-to-substrate distance of 6.5 cm, GdBCO films were deposited at the substrate temperature of 810 °C in the oxygen pressure of 400 mTorr. Optimally processed GdBCO samples exhibited Tc of 91.3 K and Jc of 5.2 MA/cm2 at 77 K in self field. When the film thickness increased from 0.15 to 2.2 μm, Jc values were decreased from 5.2 to 1.3 MA/cm2. It was considered that the Jc reduction with increasing the thickness is attributed to the increase in the average size and density of particulates, leading to decrease in superconducting phase fraction, and also to the formation of cracks, reducing the supercurrent path.",

keywords = "Critical current density (J), Critical temperature (T), GdBCO thin film, Pulsed laser deposition (PLD)",

author = "Song, \{S. H.\} and Ko, \{K. P.\} and Ko, \{R. K.\} and Song, \{K. J.\} and Moon, \{S. H.\} and Yoo, \{S. I.\}",

year = "2007",

month = oct,

day = "1",

doi = "10.1016/j.physc.2007.04.237",

language = "English",

volume = "463-465",

pages = "497--500",

journal = "Physica C: Superconductivity and its Applications",

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TY - JOUR

T1 - High-Jc GdBa2Cu3O7 thin films on SrTiO3 substrates by pulsed laser deposition

AU - Song, S. H.

AU - Ko, K. P.

AU - Ko, R. K.

AU - Song, K. J.

AU - Moon, S. H.

AU - Yoo, S. I.

PY - 2007/10/1

Y1 - 2007/10/1

N2 - We investigated the effect of film thickness on the superconducting properties of GdBa2Cu3O7 (GdBCO) films on the SrTiO3 (STO)(1 0 0) substrates which were fabricated using pulsed laser deposition (PLD) with a KrF exicmer laser (248 nm) pulses of 2.5 J/cm2. With the target-to-substrate distance of 6.5 cm, GdBCO films were deposited at the substrate temperature of 810 °C in the oxygen pressure of 400 mTorr. Optimally processed GdBCO samples exhibited Tc of 91.3 K and Jc of 5.2 MA/cm2 at 77 K in self field. When the film thickness increased from 0.15 to 2.2 μm, Jc values were decreased from 5.2 to 1.3 MA/cm2. It was considered that the Jc reduction with increasing the thickness is attributed to the increase in the average size and density of particulates, leading to decrease in superconducting phase fraction, and also to the formation of cracks, reducing the supercurrent path.

AB - We investigated the effect of film thickness on the superconducting properties of GdBa2Cu3O7 (GdBCO) films on the SrTiO3 (STO)(1 0 0) substrates which were fabricated using pulsed laser deposition (PLD) with a KrF exicmer laser (248 nm) pulses of 2.5 J/cm2. With the target-to-substrate distance of 6.5 cm, GdBCO films were deposited at the substrate temperature of 810 °C in the oxygen pressure of 400 mTorr. Optimally processed GdBCO samples exhibited Tc of 91.3 K and Jc of 5.2 MA/cm2 at 77 K in self field. When the film thickness increased from 0.15 to 2.2 μm, Jc values were decreased from 5.2 to 1.3 MA/cm2. It was considered that the Jc reduction with increasing the thickness is attributed to the increase in the average size and density of particulates, leading to decrease in superconducting phase fraction, and also to the formation of cracks, reducing the supercurrent path.

KW - Critical current density (J)

KW - Critical temperature (T)

KW - GdBCO thin film

KW - Pulsed laser deposition (PLD)

UR - https://www.scopus.com/pages/publications/34548416764

U2 - 10.1016/j.physc.2007.04.237

DO - 10.1016/j.physc.2007.04.237

M3 - Journal article

AN - SCOPUS:34548416764

SN - 0921-4534

VL - 463-465

SP - 497

EP - 500

JO - Physica C: Superconductivity and its Applications

JF - Physica C: Superconductivity and its Applications

IS - SUPPL.

ER -

High-J_c GdBa₂Cu₃O₇ thin films on SrTiO₃ substrates by pulsed laser deposition

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Keywords

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