Optimizing the structural and electrical properties of Ba2YCu3O7-delta

Julia M. Phillips; Michael P. Siegal

doi:10.1117/12.25745

1 March 1991 Optimizing the structural and electrical properties of Ba₂YCu₃O₇-delta

Julia M. Phillips, Michael P. Siegal

Proceedings Volume 1394, Progress In High-Temperature Superconducting Transistors and Other Devices; (1991) https://doi.org/10.1117/12.25745
Event: Processing Integration, 1990, Santa Clara, CA, United States

Abstract

We have optimized the properties of Ba2YCu3O7 (BYCO) ifims grown by co-evaporation of Y, Cu, and BaF2 followed by a two stage anneal. We find that control of the stoichiometry of the film to 1% is critical to the optimization of both structural and electrical properties. The temperature and time of the high temperature annealing stage are vital to the optimization of the crystallinity and morphology of the ifim; deviations of as little as 25°C can have profound effects on both. The low temperature annealing stage parameters are important for the oxygenation of the film, and hence its superconducting properties. Using our optimized annealing conditions on 100 nm films of correct stoichiometry grown on LaAlO3(001), we obtain Tc(RO)=9OK AT(10-90%)0.5K, and J(77K)1<106Ncm2 in essentially zero magnetic field. The morphology of these films is smooth, and the crystallinity is excellent as measured by Rutherford backscattering/channeling 1 %).

Citation Download Citation

Julia M. Phillips and Michael P. Siegal "Optimizing the structural and electrical properties of Ba₂YCu₃O₇-delta", Proc. SPIE 1394, Progress In High-Temperature Superconducting Transistors and Other Devices, (1 March 1991); https://doi.org/10.1117/12.25745

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available