Oxide superconducting wire and method of manufacturing the same
AssigneeFujikura Ltd.
InventorsWataru Hirata, Shinji Fujita
Life of this patent
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Abstract
An oxide superconducting wire includes a superconducting layer deposited on a substrate. The superconducting layer includes an oxide superconductor RE-Ba—Cu—O and artificial pinning centers ABO3, where RE is a rare earth element, A is Ba, Sr or Ca, and B is Hf, Zr, or Sn. In a TEM image of a cross-section of the superconducting layer, a standard deviation σ of an inclination angle of the artificial pinning center rods with respect to a cross-sectional direction of the superconducting layer is 6.13° to 11.73° and an average length of the artificial pinning center rods is 19.84 to 25.44 nm.
Claims9
An oxide superconducting wire comprising:
- a superconducting layer deposited on a substrate, wherein
- the superconducting layer comprises:
- an oxide superconductor comprising RE-Ba—Cu—O;
- and
- artificial pinning center rods comprising ABO3, where
- RE is a rare earth element,
- A is Ba, Sr or Ca, and
- B is Hf, Zr, or Sn, and
- in a TEM image of a cross-section of the superconducting layer, a standard deviation n of an inclination angle of the artificial pinning center rods with respect to a cross-sectional direction of the superconducting layer is 6.13° to 11.73° and an average length of the artificial pinning center rods is 19.84 to 25.44 nm.
A method of manufacturing an oxide superconducting wire having a critical current density Jc of 6.0 MA/cm2 or more in a magnetic field of 2 T in a c-axis direction at a temperature of 30K, the method comprising:
- depositing, by a pulsed laser deposition method at a deposition rate of 23 nm/sec or more, a superconducting layer that comprises:
- an oxide superconductor comprising RE-Ba—Cu—O;
- and
- artificial pinning center rods comprising ABO3, where
- RE is a rare earth element,
- A is Ba, Sr or Ca, and
- B is Hf, Zr or Sn.
Dependencies are inferred from the claim text.