Skip to main content

Research Repository

Advanced Search

Biaxial Strain Measurements of Jc on a (RE)BCO Coated Conductor

Greenwood, Jack R.; Surrey, Elizabeth; Hampshire, Damian P.

Biaxial Strain Measurements of Jc on a (RE)BCO Coated Conductor Thumbnail


Elizabeth Surrey


For several years it has been possible to measure the uniaxial strain dependence of the critical current density JC (ε) of (RE)BCO coated conductors [(RE)BCO tapes] and a parabolic strain dependence of JC (ε) has been observed. To improve our understanding of how strain affects the electrical and mechanical properties of a SuperPower APC SCS4050 (RE)BCO tape, we have created a biaxial sample holder that can apply arbitrary strains along both the x- and y-axes of a (RE)BCO tape simultaneously. It can be used to measure JC for independently controllable applied x and y strains ranging from −0.50% εx 0.30% to −0.15% εy 0.20%, respectively, at 77 K. We present the results of JC measurements over this strain range at 77 K in magnetic fields of up to 0.7 T. We show that we obtain the standard parabolic relationship for JC (εx), with a peak in JC occurring at εxP = −0.01%. We also show that when we apply an additional y strain of εy = −0.08% the peak in JC moves to εxP = 0.4%, which cannot be explained by considering the differential strains produced by nonsuperconducting components of the tape and sample holder. In addition, the value of JC at the peak increases considerably by 11%.


Greenwood, J. R., Surrey, E., & Hampshire, D. P. (2018). Biaxial Strain Measurements of Jc on a (RE)BCO Coated Conductor. IEEE Transactions on Applied Superconductivity, 28(4), Article 8400705.

Journal Article Type Article
Acceptance Date Jan 10, 2018
Online Publication Date Jan 15, 2018
Publication Date Jun 1, 2018
Deposit Date Mar 15, 2018
Publicly Available Date Mar 16, 2018
Journal IEEE Transactions on Applied Superconductivity
Print ISSN 1051-8223
Electronic ISSN 1558-2515
Publisher Institute of Electrical and Electronics Engineers
Peer Reviewed Peer Reviewed
Volume 28
Issue 4
Article Number 8400705
Keywords Critical current, strain measurement, 2G HTS conductors, cuprates


Accepted Journal Article (538 Kb)

Copyright Statement
© 2018 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.

You might also like

Downloadable Citations