Claims
- 1. Method for the preparation of a superconducting thin film composition of the formula YBa.sub.2 Cu.sub.3 O.sub.(7-x) wherein x has a value less than 0.75 which comprises subjecting a thin film of non-superconducting YBa.sub.2 Cu.sub.3 O.sub.(7-x) wherein x has a value greater than 0.75 to an oxygen plasma near room temperature for at least one hour.
- 2. Method in accordance with claim 1 wherein plasma oxidation is effected in a cylindrical reactor at a power density of less than 0.005 Watts/cm.sup.3 by RF heating at an oxygen pressure of the order of 0.7 Torr. and a frequency of 13.56 MH.sub.z.
- 3. The method treating a non-superconducting composition of a material YBa.sub.2 CU.sub.3 O.sub.(7-x) wherein x has a value greater than 0.75 to obtain a superconducting composition wherein x is less than 0.75 comprising subjecting the composition to an oxygen plasma near room temperature for at least one hour to assure the proper oxygen stoichiometry.
Parent Case Info
This is a division of application Ser. No. 064,803 filed June 19, 1987 now abandoned.
US Referenced Citations (1)
Number |
Name |
Date |
Kind |
4362765 |
Abe et al. |
Dec 1982 |
|
Foreign Referenced Citations (1)
Number |
Date |
Country |
61-168530 |
Jul 1986 |
JPX |
Divisions (1)
|
Number |
Date |
Country |
Parent |
64803 |
Jun 1987 |
|