RETRACTED ARTICLE: Significantly enhanced critical current density and pinning force in nanostructured, (RE)BCO-based, coated conductor
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Post-publication record
- Nature
- Retraction
- Reason
- Error in Analyses;Error in Methods;Error in Results and/or Conclusions;Error in Text;Investigation by Third Party;
- Date
- 10/23/2024 0:00
- Flagged by OpenAlex?
- Yes
Source: Retraction Watch, joined by DOI. OpenAlex records retraction as is_retracted, a boolean over a state space with at least four values, so it cannot express an expression of concern, a correction or a reinstatement — it reports them as false, which reads as “fine”.
Abstract
High-temperature superconducting wires have many large-scale, niche applications such as commercial nuclear fusion as well as numerous other large-scale applications in the electric power industry and in the defense, medical and transportation industries. However, the price/performance metric of these coated conductor wires is not yet favorable to enable and realize most large-scale applications. Here we report on probing the limits of J c (H, T) possible via defect engineering in heteroepitaxially deposited high-temperature superconducting thin-films on coated conductor substrates used for long-length wire fabrication. We report record values of J c (H, T) and pinning force, F p (H, T) in (RE)BCO films with self-assembled BaZrO3 nanocolumns deposited on a coated conductor substrate. A J c of ~190 MA/cm2 at 4.2 K, self-field and ~90 MA/cm2, at 4.2 K, 7 T was measured. At 20 K, J c of over 150 MA/cm2 at self-field and over 60 MA/cm2 at 7 T was observed. A very high pinning force, F p, of ~6.4 TN/m3 and ~4.2 TN/m3 were observed at 7 T, 4.2 K and 7 T, 20 K respectively. We report on the highest values of J c and F p obtained to date for all fields and operating temperatures from 4.2 K to 77 K. These results demonstrate that significant performance enhancements and hence far more favorable price/performance metrics are possible in commercial high-temperature superconducting wires. In this work, authors demonstrate defect engineering in heteroepitaxially deposited high-temperature superconducting thin-films on coated conductor substrates achieving significant performance enhancement in the critical current density and pinning force achievable in coated conductors.
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The record
- Venue
- Nature Communications
- Topic
- Electronic and Structural Properties of Oxides
- Field
- Materials Science
- Canadian institutions
- McMaster University
- Funders
- Division of Materials ResearchOffice of Naval ResearchShanghai Jiao Tong UniversityCornell Center for Materials ResearchU.S. Department of Defense
- Keywords
- ConductorCritical currentCurrent (fluid)Materials scienceCurrent densityCondensed matter physicsNanotechnologyPhysicsSuperconductivityComposite material
- Has abstract in OpenAlex
- yes