NDLI: High <formula formulatype=inline><tex Notation=TeX>$J_{rm c}$</tex></formula> <formula formulatype=inline><tex Notation=TeX>${hbox {GdBa}}_{2}{hbox {Cu}}_{3}{hbox {O}}_{7-delta}$</tex></formula> Coated Conductors on <formula formulatype=inline><tex Notation=TeX>${hbox {CeO}}_{2}$</tex></formula>-Buffered IBAD MgO Template Fabricated by Pulsed Laser Deposition

Content Provider	IEEE Xplore Digital Library
Author	Kyoung-Pil Ko Seung-Hyun Moon Chan Park Sang-Im Yoo
Copyright Year	2002
Abstract	High quality GdBa₂Cu₃O_7-δ (GdBCO) coated conductors (CCs) were successfully fabricated on CeO₂-buffered IBAD MgO template by pulsed laser deposition (PLD). With the same energy density of 2 J/cm², laser frequency of 8 Hz, and oxygen pressure of 300 mTorr, both target-to-substrate distance (D_ts) and substrate temperature (T_s) were systematically varied from 5.5 to 4.0 cm at T_s of 780 °C and from 760 to 820 °C at D_ts of 4.5 cm, respectively, to investigate their effects on the grain alignment, microstructure, and superconducting properties of GdBCO films. Biaxially aligned GdBCO films without a-axis oriented GdBCO grains could be deposited at T_s higher than 780 °C and D_ts shorter than 5.0 cm. At T_s of 760 °C, a small amount of a-axis oriented and 45^° misaligned GdBCO grains was formed. The in-plane textures of GdBCO films were gradually improved when D_ts decreased, while those were first improved with increasing T_s up to 800 ^°C and then degraded at 820 °C. The highest critical current density (J_c) of 3.9 MA/cm² and critical current (I_c) of 195 A/cm-width (77 K, self-field) were achieved from the 500 nm GdBCO film deposited at 800°C with D_ts of 4.5 cm . The J_c values of GdBCO films were found to be sensitive to the in-plane texture and also to the presence of a -axis oriented grains and 45° misaligned grains.
Sponsorship	Council on Superconductivity Appl. Superconductivity Conference Inc MIT
Starting Page	2965
Ending Page	2968
Page Count	4
File Size	647895
File Format	PDF
ISSN	10518223
Volume Number	21
Issue Number	3
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-06-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Yttrium barium copper oxide Buffer layers Conductors Copper Substrates Fabrication Moon PLD ${\hbox {CeO}}_{2}$ buffer GdBCO IBAD MgO
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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${rm GdBa}_{2}{rm Cu}_{3}{rm O}_{7-delta}$ Coated Conductor on ${rm BaZrO}_{3}$ -Buffered IBAD-MgO Template

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