A STUDY ON THE CONTROL OF THE MATERIAL PROPERTIES OF BI2SR2CACU2OX THIN-FILMS FOR INTRINSIC JOSEPHSON-JUNCTIONS

Citation
M. Inoue et al., A STUDY ON THE CONTROL OF THE MATERIAL PROPERTIES OF BI2SR2CACU2OX THIN-FILMS FOR INTRINSIC JOSEPHSON-JUNCTIONS, Physica. C, Superconductivity, 307(3-4), 1998, pp. 221-228
Citations number
15
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics, Applied
ISSN journal
0921-4534
Volume
307
Issue
3-4
Year of publication
1998
Pages
221 - 228
Database
ISI
SICI code
0921-4534(1998)307:3-4<221:ASOTCO>2.0.ZU;2-S
Abstract
We investigated the annealing conditions to observe intrinsic Josephso n effects using Bi-cuprate superconductor thin films. We fabricated a mesa structure using as-grown and annealed Bi2Sr2CaCu2Ox (Bi-2212) thi n films and measured their electrical properties along the c-axis. Con sequently, we succeeded in fabricating intrinsic Josephson junctions u sing Bi-2212 thin films by means of a two-step annealing procedure, wh ich is a combination of a high-temperature annealing in O-2 and a low- temperature annealing in N-2. By this annealing method, the grain size changed over the range from 0.02 mu m to more than 5 mu m in diameter and the critical temperature T-c could be controlled in the range of 72-85 K. The critical current density along the c-axis, J(cc), was als o controlled in the range of 10(4)-10(1) A/cm(2). The temperature depe ndence of the resistivity of the mesa with reduced J(cc) was semicondu ctor-like above T-c. The current-voltage (I-V) characteristics exhibit ed clear hystereses and multiple branches, and the observed voltage ju mp was 3-20 mV. (C) 1998 Elsevier Science B.V. All rights reserved.