# US 11,881,328 B2 · Superconductor article with directional flux pinning

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- Number: US 11,881,328 B2
- Document ID: US11881328B2
- Status: Granted
- Kind: B2
- Application number: 17/719,317
- Filed: 2022-04-12
- Published: 2022-07-21
- Granted: 2024-01-23
- Earliest claimed: 2012-06-12
- Assignees: University of Houston System; SuperPower, Inc.
- Applicants: University of Houston System; SuperPower, Inc.
- Inventors: Venkat Selvamanickam; Yimin Chen
- Web page: https://patentgrep.com/patent/US11881328B2

## CPC

- H01B 12/02: characterised by their form
- H01B 1/026: {Alloys based on copper}
- H01B 9/006: {Constructional features relating to the conductors}
- H10N 60/0828: {Introducing flux pinning centres}
- H10N 60/203: {comprising high-Tc ceramic materials}
- H10N 60/857: {comprising copper oxide}
- H10N 60/0632: {Intermediate layers, e.g. for growth control}
- Y02E 40/60: Superconducting electric elements or equipment; Power systems integrating superconducting elements or equipment
- H01B: CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES (selection for magnetic properties H01F1/00; waveguides H01P {; printed circuits H05K})
- H10N: ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

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

## Claims

### Claim 1

A superconducting tape comprising:
a plurality of nanocolumns oriented perpendicular to a surface of the superconducting tape,
the superconducting tape having a first critical current at 0 T at 77 K;
wherein the superconducting tape is configured to have a magnetic field applied thereto, wherein the magnetic field is applied parallel to the surface of the superconducting tape at about 0.1 T at 77 K; and
wherein the superconducting tape is configured to retain, upon application of the magnetic field, a second critical current that is at least about 90% of the first critical current.

### Claim 2 (depends on 1)

The superconducting tape 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.

### Claim 3 (depends on 2)

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

### Claim 4 (depends on 3)

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

### Claim 5 (depends on 4)

The superconducting tape 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.

### Claim 6

A superconducting tape comprising:
a plurality of nanocolumns oriented perpendicular to a surface of the superconducting tape, the superconducting tape having a first critical current at 0 T at 77 K;
wherein the superconducting tape is configured to have a magnetic field applied thereto, wherein the magnetic field is applied parallel to the surface of the superconducting tape at about 0.5 T at 77 K; and
wherein the superconducting tape is configured to retain, upon application of the magnetic field, a second critical current that is at least about 50% of the first critical current.

### Claim 7 (depends on 6)

The superconducting tape 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.

### Claim 8 (depends on 7)

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

### Claim 9 (depends on 8)

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

### Claim 10 (depends on 9)

The superconducting tape 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.

### Claim 11

A superconducting tape comprising:
a plurality of nanocolumns oriented perpendicular to a surface of the superconducting tape, the superconducting tape having a first critical current at 0 T at 77 K;
wherein the superconducting tape is configured to have a magnetic field applied thereto, wherein the magnetic field is applied parallel to the surface of the superconducting tape at about 1 Tat 77 K; and
wherein the superconducting tape is configured to retain, upon application of the magnetic field, a second critical current that is at least about 30% of the first critical current.

### Claim 12 (depends on 11)

The superconducting tape 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.

### Claim 13 (depends on 12)

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

### Claim 14 (depends on 13)

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

### Claim 15 (depends on 14)

The superconducting tape 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.