# US 8,772,201 B2 · Oxide superconducting conductor and method of manufacturing the same

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 8,772,201 B2
- Document ID: US8772201B2
- Status: Granted
- Kind: B2
- Application number: 13/646,077
- Filed: 2012-10-05
- Published: 2013-02-28
- Granted: 2014-07-08
- Earliest claimed: 2010-04-26
- Assignees: Fujikura Ltd.
- Applicants: Fujikura Ltd.
- Inventors: Mitsunori Igarashi
- Web page: https://patentgrep.com/patent/US8772201B2

## CPC

- H10N 60/857: {comprising copper oxide}
- H10N 60/0521: {by pulsed laser deposition, e.g. laser sputtering}
- H10N 60/0828: {Introducing flux pinning centres}
- H10N: ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR

## Abstract

An oxide superconducting conductor of the invention is configured to include an oxide superconducting layer including a substrate and an oxide superconductor formed on the substrate. The oxide superconductor being expressed by a composition formula of RE1Ba2Cu3Oy where RE represents a rare earth element and an expression of 6.5<y<7.1 is satisfied. A normal conduction phase including Ba and a different phase including an alkaline earth metal having an ionic radius smaller than that of Ba are dispersed in the oxide superconducting layer. The normal conduction phase is an oxide including Ba and one selected from a group consisting of Zr, Sn, Hf, Ce, and Ti.

## Claims

### Claim 1

An oxide superconducting conductor comprising:
an oxide superconducting layer comprising a substrate and an oxide superconductor formed on the substrate, the oxide superconductor being expressed by a composition formula of RE1Ba2Cu3Oy where RE represents a rare earth element and an expression of 6.5<y <7.1 is satisfied, wherein
a normal conduction phase including Ba and a different phase including an alkaline earth metal having an ionic radius smaller than that of Ba are dispersed in the oxide superconducting layer,
the normal conduction phase is an oxide including Ba and one selected from a group consisting of Zr, Sn, Hf, Ce, and Ti,
the one selected from the group consisting of Zr, Sn, Hf, Ce, and Ti in the oxide superconducting layer is in a range of 0.01 mass % to 1 mass % with respect to the RE1Ba2Cu3Oy,
the alkaline earth metal in the oxide superconducting layer is in a range of 0.01 mass % to 0.25 mass % with respect to the RE1Ba2Cu3Oy, and
an introduction amount of the alkaline earth metal is less than or equal to 40 mol % with respect to an introduction amount of the one selected from the group consisting of Zr, Sn, Hf, Ce, and Ti.

### Claim 2 (depends on 1)

The oxide superconducting conductor according to claim 1, wherein
the alkaline earth metal is Sr or Ca.

### Claim 3 (depends on 1)

The oxide superconducting conductor according to claim 1, wherein
the normal conduction phase is an oxide including Ba and Zr, and
the alkaline earth metal is Sr.

### Claim 4 (depends on 1)

The oxide superconducting conductor according to claim 1, wherein
an intermediate layer and a cap layer are interposed between the substrate and the oxide superconducting layer in this order, and a stabilizing layer are formed on the oxide superconducting layer.

### Claim 5

A method of manufacturing an oxide superconducting conductor, comprising:
using a target including a constituent element of an oxide superconductor, one selected from a group consisting of Zr, Sn, Hf, Ce, and Ti, and an alkaline earth metal having an ionic radius smaller than that of Ba, the oxide superconductor being expressed by a composition formula of RE1Ba2Cu3Oy where RE represents a rare earth element and an expression of 6.5<y <7.1 is satisfied; and
forming an oxide superconducting layer, in which a normal conduction phase and a different phase are dispersed, on a substrate by physical vapor deposition, the normal conduction phase including Ba and one selected from the group consisting of Zr, Sn, Hf, Ce, and Ti, the one selected from the group consisting of Zr, Sn, Hf, Ce, and Ti in the oxide superconducting layer being in a range of 0.01 mass % to 1 mass % with respect to the RE1Ba2Cu3Oy,the different phase including the alkaline earth metal having an ionic radius smaller than that of Ba, the alkaline earth metal in the oxide superconducting layer being in a range of 0.01 mass % to 0.25 mass % with respect to the RE1Ba2Cu3Oy, an introduction amount of the alkaline earth metal being less than or equal to 40 mol % with respect to an introduction amount of the one selected from the group consisting of Zr, Sn, Hf, Ce, and Ti.

### Claim 6 (depends on 5)

The method according to claim 5, wherein
as the target, a sintered target is used in which powder of a compound including the one selected from the group consisting of Zr, Sn, Hf, Ce, and Ti is doped in a range of 0.1 mol % to 10 mol % with respect to powder including the constituent element of the RE1Ba2Cu3Oy where RE represents a rare earth element and the expression of 6.5<y <7.1 is satisfied, and powder of a compound including the alkaline earth metal is doped in a range of 0.1 mol % to 2 mol %.