Oxygen nonstoichiometry of MBE-grown cuprate films to lose or give high-Tc superconductivity

Michio Naito; Hisashi Sato; Hideki Yamamoto

doi:10.1117/12.335878

22 December 1998 Oxygen nonstoichiometry of MBE-grown cuprate films to lose or give high-T_c superconductivity

Michio Naito, Hisashi Sato, Hideki Yamamoto

Proceedings Volume 3481, Superconducting and Related Oxides: Physics and Nanoengineering III; (1998) https://doi.org/10.1117/12.335878
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1998, San Diego, CA, United States

Abstract

This paper describes our recent progress in MBE growth and the surface/interface investigation of high-T_c superconducting films. The careful XPS analyses of the in-situ surface and interface reaction for MBE grown (Nd,Ce)₂CuO₄ films demonstrate that correct oxygen stoichiometry is the most crucial issue in preparing high-quality films and improving the characteristics of tunnel junctions. In other words, oxygen nonstoichiometry easily occurs at the surface or interface in cuprates. By utilizing this fact in a positive way, we have succeeded in preparing of the highest quality La₂CuO_4+(delta ) films ever and have discovered a new superconducting Ba₂CuO_4-(delta ) film by a simple and efficient oxidation process using ozone in a vacuum chamber.

Citation Download Citation

Michio Naito, Hisashi Sato, and Hideki Yamamoto "Oxygen nonstoichiometry of MBE-grown cuprate films to lose or give high-T_c superconductivity", Proc. SPIE 3481, Superconducting and Related Oxides: Physics and Nanoengineering III, (22 December 1998); https://doi.org/10.1117/12.335878

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