University of Arkansas

University of Kansas

Midwest Superconductivity, Inc.

Fui T Chan

Zhengzhi Sheng

Ying Xin

Kai W Wong

Greg J Salamo

Wai-Yim Ching

Bingruo Xu

Peter C Fung

Iatneng Chan

Improved superconducting thin films are provided having very high T.sub.c (zero) and J.sub.c values, on the order of greater than or equal to 120K and 10.sup.5 A/cm.sup.2 or greater, respectively. The films of the invention are adapted for deposit and support on a compatible substrate, and include a superconductive material, most preferably Tl.sub.2 Ba.sub.2 Ca.sub.2 Cu.sub.3 O.sub.10, with up to about 10% elemental gold admixed with the superconductive material. The preferred method for fabricating the thin film superconductors comprises first forming a non-superconducting precursor film on a compatible substrate which is placed in contact with an unsintered bulk body containing thallium; the substrate with precursor film are sintered with the bulk body to form the desired superconductor material.

Method of fabricating thin film superconducting materials

Vanadium-containing superconducting oxides are disclosed having critical temperature (T.sub.c) values of above about 100.degree. K. and preferably about 110.degree.-150.degree. K., together with predicted current density (J.sub.c) values on the order of 10.sup.4 -10.sup.5 amperes/cm.sup.2. The oxides hereof are moreover relatively ductile and easily bulk sintered to give end products having desirable superconductivity characteristics. Certain preferred oxides of the invention are defined by the general formula:

Vanadium-based superconducting metallic oxides

Growing community of inventors

Fayetteville, AR, United States of America

Fui T Chan