US5650376A
Expired / Lapsed
US
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(Nd, Ba)3 Cu3 O7-d superconductor film
Assignee: New Energy and Industrial Technology Development Organization
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Filing: 1995-11-06
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Granted: 1997-07-22
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Expires: 2015-11-06
Abstract
Abstract A superconducting film is disclosed which has the following composition: (Nd, Ba).sub.3 Cu.sub.3 O.sub.7-d where d is a number greater than 0 but smaller than 0.5. The superconducting film has the same crystal structure as that of YBa 2 Cu 3 O 7 except that part of the Nd sites and/or part of the Ba sites are occupied by Ba and Nd atoms, respectively.
Inventors
- 👤 Massoud Badaye
- 👤 Tadataka Morishita
- 👤 Youichi Enomoto
- 👤 Shoji Tanaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:35
CPC Classifications
H; H10; H10N; H10N60/00; H10N60/80; H10N60/85; H10N60/855; H10N60/857; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9265; Y10S428/93; Y10S505/00; Y10S505/70; Y10S505/701
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
87 words
A superconducting film formed on a substrate and having a superconducting critical temperature Tc of between 77 K. and 96 K. and having the following composition: (Nd, Ba).sub.3 Cu.sub.3 O.sub.7-d where d is a number greater than 0 but smaller than 0.5, said superconducting film having Nd and Ba sites and the same crystal structure as that of YBa 2 Cu 3 O 7 , wherein part of the Nd sites are occupied by Ba atoms and/or part of the Ba sites are occupied by Nd atoms.
Claim 2
Dependent Claim
87 words
A superconducting film formed on a substrate and having a superconducting critical temperature Tc of between 77 K. and 96 K. and having the following composition: (Nd, Ba).sub.3 Cu.sub.3 O.sub.7-d where d is a number greater than 0 but smaller than 0.5, said superconducting film having Nd and Ba sites and the same crystal structure as that of YBa 2 Cu 3 O 7 , wherein part of the Nd sites are occupied by Ba atoms and/or part of the Ba sites are occupied by Nd atoms.
Claim 3
Dependent Claim
22 words
A superconducting film as claimed in claim 1, having a c-axis length of greater than 11.70 Å but smaller than 11.77 Å.
Claim 4
Dependent Claim
24 words
A superconducting film as claimed in claim 1, wherein the substrate is a single crystal selected from SrTiO 3 , NdGaO 3 and MgO.
Claim 5
Dependent Claim
28 words
A superconducting film as claimed in claim 1, having the following composition: Nd.sub.1+x Ba.sub.2-x Cu.sub.3 O.sub.7-d wherein X and d are numbers satisfying the following conditions: 0.03<x<0.12 0<d<0.5.
References Cited (Backward Citations)
JPH04258171A
Cited
US5149684A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-07-21 | 2001-01-20 | 2001-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-07-21 | 2005-01-20 | 2005-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-07-21 | 2009-01-20 | 2009-07-22 | $7700.00 | Window Closed / Lapsed |