New superconducting Sr2CuO4-delta thin films prepared by molecular beam epitaxy

Authors
Karimoto, S Yamamoto, H Greibe, T Naito, M
Citation
S. Karimoto et al., New superconducting Sr2CuO4-delta thin films prepared by molecular beam epitaxy, JPN J A P 2, 40(2B), 2001, pp. L127-L130
Citations number
20
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS → ACNP
Volume
40
Issue
2B
Year of publication
2001
Pages
L127 - L130
Database
ISI
SICI code
Abstract
We report the synthesis of new superconducting Sr2CUO4-delta thin films (T- c(onset) similar to 75 K) using molecular beam epitaxy (MBE). This supercon ductor has a tetragonal structure with an in-plane lattice constant a(o) si milar to 3.79 Angstrom and a c-axis lattice constant c(o) similar to 13.55 Angstrom. This c-axis lattice constant is significantly larger than previou sly reported for this system. Strong oxidation using ozone gas at a low tem perature of around 350 degreesC is essential to the realization of phase co nversion from the orthorhombic insulating phase (Sr2CuO3) to the tetragonal superconducting phase (Sr2CuO4-delta).