Superconductor article with directional flux pinning

Patent metadata

Field	Value
Publication number	US-10607753-B2
Application number	US-201615384486-A
Country	US
Kind code	B2
Filing date	Dec 20, 2016
Priority date	Jun 12, 2012
Publication date	Mar 31, 2020
Grant date	Mar 31, 2020

Abstract

A method and composition for doped HTS tapes having directional flux pinning and critical current.

First claim

What is claimed:

1. A method of using a superconducting tape, comprising:
providing a superconducting tape comprising a plurality of nanocolumns oriented perpendicular to the surface of the superconducting tape, the superconducting tape having a first critical current;
applying a magnetic field parallel to a surface of the superconducting tape, wherein the magnetic field is applied at about 0.1 T at 77 K; and
retaining, upon application of the magnetic field, a critical current that is at least about 90% of the first critical current.

2. The method of claim 1 , wherein the superconducting tape comprises copper and a rare-earth metal content of at least two of Gd, Y, Sm, Nd, Eu, Dy, Ho, Er or Yb, and wherein the superconducting tape comprises a ratio of the total rare-earth metals content to copper content of at least 1.5:3.

3. The method of claim 2 , wherein the rare-earth metals content comprises Y and one of Sm or Gd.

4. The method of claim 3 , wherein the ratio Y to Sm or Gd comprises a ratio of about 1:1.

5. The method of claim 4 , wherein the superconducting tape comprises copper and at least one dopant comprising Zr, Ta, Hf, Sn, Nb, Ti or Ce, and wherein the dopant content to copper content ratio comprises at least about 0.05 dopant to at least about 3 copper.

6. A method of using a superconducting tape, comprising:
providing a superconducting tape comprising a plurality of nanocolumns oriented perpendicular to the surface of the superconducting tape, the superconducting tape having a first critical current;
applying a magnetic field parallel to a surface of the superconducting tape, wherein the magnetic field is applied at about 0.5 T at 77 K; and
retaining, upon application of the magnetic field, a critical current that is at least about 50% of the first critical current.

7. The method of claim 6 , wherein the superconducting tape comprises copper and a rare-earth metal content of at least two of Gd, Y, Sm, Nd, Eu, Dy, Ho, Er or Yb, and wherein the superconducting tape comprises a ratio of the total rare-earth metals content to copper content of at least 1.5:3.

8. The method of claim 7 , wherein the rare-earth metals content comprises Y and one of Sm or Gd.

9. The method of claim 8 , wherein the ratio Y to Sm or Gd comprises a ratio of about 1:1.

10. The method of claim 9 , wherein the superconducting tape comprises copper and at least one dopant comprising Zr, Ta, Hf, Sn, Nb, Ti or Ce, and wherein the dopant content to copper content ratio comprises at least about 0.05 dopant to at least about 3 copper.

11. A method of using a superconducting tape, comprising:
providing a superconducting tape comprising a plurality of nanocolumns oriented perpendicular to the surface of the superconducting tape, the superconducting tape having a first critical current;
applying a magnetic field parallel to a surface of the superconducting tape, wherein the magnetic field is applied at about 1 T at 77 K; and
retaining, upon application of the magnetic field, a critical current that is at least about 30% of the first critical current.

12. The method of claim 11 , wherein the superconducting tape comprises copper and a rare-earth metal content of at least two of Gd, Y, Sm, Nd, Eu, Dy, Ho, Er or Yb, and wherein the superconducting tape comprises a ratio of the total rare-earth metals content to copper content of at least 1.5:3.

13. The method of claim 12 , wherein the rare-earth metals content comprises Y and one of Sm or Gd.

14. The method of claim 13 , wherein the ratio Y to Sm or Gd comprises a ratio of about 1:1.

15. The method of claim 14 , wherein the superconducting tape comprises copper and at least one dopant comprising Zr, Ta, Hf, Sn, Nb, Ti or Ce, and wherein the dopant content to copper content ratio comprises at least about 0.05 dopant to at least about 3 copper.

Assignees

• Univ Houston System
• Superpower Inc

Inventors

• Selvamanickam Venkat
• Chen Yimin

Classifications

• H01B9/006

  Constructional features relating to the conductors · CPC title

• H01B12/02 Primary

  characterised by their form · CPC title

• H01B1/026 Primary

  Alloys based on copper · CPC title

• H01L39/143

  Electricity · mapped topic

• H01L39/2483

  Electricity · mapped topic