Ultra-high performance, high-temperature superconducting wires via cost-effective, scalable, co-evaporation process

Long-length, high-temperature superconducting (HTS) wires capable of carrying high critical current, Ic, are required for a wide range of applications. Here, we report extremely high performance HTS wires based on 5 μm thick SmBa2Cu3O7--δ (SmBCO) single layer films on textured metallic templates. Sm...

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Bibliographic Details
Published in:	Scientific reports 2014-04, Vol.4 (1), p.4744-4744, Article 4744
Main Authors:	Kim, Ho-Sup, Oh, Sang-Soo, Ha, Hong-Soo, Youm, Dojun, Moon, Seung-Hyun, Kim, Jung Ho, Dou, Shi Xue, Heo, Yoon-Uk, Wee, Sung-Hun, Goyal, Amit
Format:	Article
Language:	eng
Subjects:	Cations Epitaxy Evaporation Temperature Temperature effects Thin films Ultrahigh temperature Wire
Online Access:	Get full text
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Summary:	Long-length, high-temperature superconducting (HTS) wires capable of carrying high critical current, Ic, are required for a wide range of applications. Here, we report extremely high performance HTS wires based on 5 μm thick SmBa2Cu3O7--δ (SmBCO) single layer films on textured metallic templates. SmBCO layer wires over 20 meters long were deposited by a cost-effective, scalable co-evaporation process using a batch-type drum in a dual chamber. All deposition parameters influencing the composition, phase, and texture of the films were optimized via a unique combinatorial method that is broadly applicable for co-evaporation of other promising complex materials containing several cations. Thick SmBCO layers deposited under optimized conditions exhibit excellent cube-on-cube epitaxy. Such excellent structural epitaxy over the entire thickness results in exceptionally high Ic performance, with average Ic over 1,000 A/cm-width for the entire 22 meter long wire and maximum Ic over 1,500 A/cm-width for a short 12 cm long tape. The Ic values reported in this work are the highest values ever reported from any lengths of cuprate-based HTS wire or conductor.
ISSN:	2045-2322 2045-2322