# CEC-ICMC 2019 - Abstracts, Timetable and Presentations

21-25 July 2019
Connecticut Convention Center, Level 6
US/Eastern timezone

## M2Po2B-05 [36]: Flux Pinning Enhancements of Y-Ba-Cu-O Thin Films with Nanosize Magnetic Additions

23 Jul 2019, 13:30
2h
Level 6, Cryo Expo Exhibit Hall

### Level 6, Cryo Expo Exhibit Hall

Poster Presentation

### Speaker

Timothy Haugan (U.S. Air Force Research Laboratory)

### Description

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 = BaFe12Ox, 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 < 1T at 65K to 77K. Microstructural and superconducting properties will be summarized, including SEM analysis.

Acknowledgements: Support from the Air Force Office of Scientific Research (AFOSR) and LRIR #18RQCOR100, and the Aerospace Systems Directorate (AFRL/RQ)

### Primary authors

Timothy Haugan (U.S. Air Force Research Laboratory) Mrs Mary Ann Sebastian (U.S. Air Force Research Laboratory)