Abstract

Different methods of flux pinning are being tested world-wide to enhance critical currents (Ics) of high temperature superconductor YBa2Cu3O7-x (YBCO) coated conductors exposed to high magnetic fields. Magnetic materials are interesting to consider as flux pinning additions because of their potential for very strong pinning strength. To our knowledge, there have been limited demonstrations of magnetic pinning additions to YBCO conductors. This paper describes the study of different M magnetic phase additions to YBCO including M = BaFe12O19, La0.67Ca0.33MnO3, and other oxide phases. Nanosize additions were incorporated by depositing multilayer (M/YBCO)N films to minimize degradation of Tc, and testing volume % additions of M phase from 0.5 % to 5%. Results indicate that Tc onsets are depressed with magnetic additions, however in some cases interestingly without degrading the transition width. With optimization of magnetic additions a 50% increase of critical current density has been obtained, for low magnetic fields of < 10,000 Oe at 65K to 77K. Microstructural and superconducting properties are summarized, including SEM analysis.

Details

Title
Flux Pinning Enhancements of YBa2Cu3O7-x with Nanosize Magnetic Additions
Author
Sebastian, M A 1 ; Pierce, N A 2 ; Maartense, I 1 ; Kozlowski, G 2 ; Haugan, T J 3 

 University of Dayton Research Institute, Dayton, OH 45469 USA 
 Wright State University, Dayton, OH 45435 USA 
 U.S. Air Force Research laboratory, Aerospace Systems Directorate, WPAFB, OH 45433 USA 
Publication year
2020
Publication date
Mar 2020
Publisher
IOP Publishing
ISSN
17578981
e-ISSN
1757899X
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2562072497
Copyright
© 2020. This work is published under http://creativecommons.org/licenses/by/3.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.