Surface characterization of superconductive Nd1Ba2Cu3Oy thin films using scanning probe microscopes

Ting Wu; Massoud Badaye; R. Itti; Tadataka Morishita; N. Koshizuka; S. Tanaka

doi:10.1117/12.250279

5 July 1996 Surface characterization of superconductive Nd₁Ba₂Cu₃O_y thin films using scanning probe microscopes

Ting Wu, Massoud Badaye, R. Itti, Tadataka Morishita, N. Koshizuka, S. Tanaka

Proceedings Volume 2697, Oxide Superconductor Physics and Nano-Engineering II; (1996) https://doi.org/10.1117/12.250279
Event: Photonics West '96, 1996, San Jose, CA, United States

Abstract

Recently, superconductive Nd₁Ba₂Cu₃O_y (Nd123) thin films with high superconducting transition temperature (Tc) have been successfully fabricated at our institute employing the standard laser ablation method. In this paper, we report parts of the results of surface characterization of the Nd123 thin films using an ultrahigh vacuum scanning tunneling microscope/spectroscopy (UHV- STM/STS) and an atomic force microscope (AFM) system operated in air. Clear spiral pattern is observed on the surfaces of Nd123 thin films by STM and AFM, suggesting that films are formed by 2D island growth mode at the final growing stage. Contour plots of the spirals show that the step heights of the spirals are not always the integer or half integer numbers of the c-axis parameter of the structure. This implies that the surface natural termination layer of the films may not be unique. Surface atomic images of the as-prepared Nd123 thin films are obtained employing both STM and AFM. STS measurements show that most of the surfaces are semiconductive, or sometimes even metallic. The results of STS measurements together with the fact that we are able to see the surface atomic images using scanning probe microscopes suggest that exposure to air does not cause serious degradation to the as-prepared surfaces of Nd123 thin films.

Citation Download Citation

Ting Wu, Massoud Badaye, R. Itti, Tadataka Morishita, N. Koshizuka, and S. Tanaka "Surface characterization of superconductive Nd₁Ba₂Cu₃O_y thin films using scanning probe microscopes", Proc. SPIE 2697, Oxide Superconductor Physics and Nano-Engineering II, (5 July 1996); https://doi.org/10.1117/12.250279

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