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Resistivity Measurements of the Strain, Temperature and Angular Dependence of the Upper Critical Field of REBCO Tapes up to 8T [dataset] Open Access

The design and operation of a miniature strain-board for measuring the resistivity of high temperature superconducting tapes as a function of uniaxial strain ( ϵ ) are described. It was used inside a Physical Property Measurement System (PPMS) that provides access to high fields, variable temperature, and a rotator that can vary the angle of the sample with respect to the field. Resistivity measurements made using the strain-board over the strain range 0% to −1.1 % in-field are presented for a REBCO (REBa 2 Cu 3 O 7 , RE: Rare-earth element) tape from SuperPower with artificial pinning centres (APC). Values of the upper critical field ( Bc2 ) were extracted from the resistivity data. We found that although the temperature and angular dependence of B c2 were similar to that found in previous studies using ac susceptibility measurements (i.e. the temperature index, n=1.2 , the anisotropy constant, γ=1.4 and the interlayer spacing s=12 Å), the upper critical field we found was almost strain independent and therefore quite different. We explain these results by considering the bimodal behaviour of REBCO under strain that is found in single crystal data, and the large parallel shunt the strain-board provided in the measurements. In our resistivity measurements, Bc2 is determined by a small percolative supercurrent that preferentially flows through material with the highest critical parameters. Conversely, resistivity measurements at high currents, or ac susceptibility measurements, characterise the material with average or low critical parameters from the broad distribution of critical parameters produced in REBCO tapes under strain.

Descriptions

Resource type

Dataset

Contributors

Editor: Raine, Mark John ¹
Editor: Hampshire, Damian Peter ¹
Creator: Gillard, Emma G E ¹

¹ Durham University, UK

Funder

Engineering and Physical Sciences Research Council

Research methods

Other description

Keyword

High fields
Strain
Superconductors and tapes

Subject

Location

Language

Cited in

doi:10.1109/TASC.2023.3273198

Identifier

ark:/32150/r2k643b1234
doi:10.15128/r2k643b1234

Rights

Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA)

Publisher

Durham University

Date Created

File Details

Depositor

E.G.E. Gillard

Date Uploaded

8 March 2023, 12:03:33

Date Modified

22 May 2023, 14:05:22

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File format: zip (ZIP Format)

Mime type: application/zip

File size: 92745

Last modified: 2023:05:19 14:03:08+01:00

Filename: Supporting_Data_for_Resistivity_Measurements.zip

Original checksum: c00c2e3201cb2067cba8241d4b38114c