US5310705A
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High-field magnets using high-critical-temperature superconducting thin films
Assignee: United States Department of Energy
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Filing: 1993-01-04
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Granted: 1994-05-10
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Expires: 2013-01-04
Abstract
Abstract High-field magnets fabricated from high-critical-temperature superconducting ceramic (HTSC) thin films which can generate fields greater than 4 Tesla. The high-field magnets are made of stackable disk-shaped substrates coated with HTSC thin films, and involves maximizing the critical current density, superconducting film thickness, number of superconducting layers per substrate, substrate diameter, and number of substrates while minimizing substrate thickness. The HTSC thin films are deposited on one or both sides of the substrates in a spiral configuration with variable line widths to increase the field.
Inventors
- 👤 Fred Mitlitsky
- 👤 Ronald W. Hoard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:23
CPC Classifications
H; H01; H01F; H01F6/00; H01F6/06; Y; Y10; Y10S; Y10S336/00; Y10S336/01; Y10S505/00; Y10S505/70; Y10S505/704; Y10S505/705; Y10S505/825; Y10S505/879; Y10S505/88
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
86 words
A high-field magnet comprising: a plurality of disk-like substrates, said disk-like substrates being of variable thickness; each of said substrates having at least one pattern of high-critical-temperature superconducting material having a thickness of 0.5-1 μm deposited on at least one side thereof; said disk-like substrates being stacked such that thinner substrates are located in an axially central location and thicker substrates are located in an axially outer location, such that the thickness of the substrates increases in thickness from the central location to the outer location.
Claim 2
Dependent Claim
86 words
A high-field magnet comprising: a plurality of disk-like substrates, said disk-like substrates being of variable thickness; each of said substrates having at least one pattern of high-critical-temperature superconducting material having a thickness of 0.5-1 μm deposited on at least one side thereof; said disk-like substrates being stacked such that thinner substrates are located in an axially central location and thicker substrates are located in an axially outer location, such that the thickness of the substrates increases in thickness from the central location to the outer location.
Claim 3
Dependent Claim
18 words
The magnet of claim 1, wherein each of said patterns deposited on said substrates has a spiral configuration.
Claim 4
Dependent Claim
21 words
The magnet of claim 2, wherein at least certain of said spiral patterns have a varying width along the length thereof.
Claim 5
Dependent Claim
28 words
The magnet of claim 3, wherein said certain of said spiral patterns are wider at an inner end and gradually decrease in width toward an outer end thereof.
Claim 6
Dependent Claim
24 words
The magnet of claim 3, wherein said certain of said spiral patterns have a line width of about 5 μm to about 5 mm.
Claim 7
Dependent Claim
25 words
The magnet of claim 2, wherein said spiral patterns are constructed such that loops of the spiral are at a constant distance from each other.
Claim 8
Dependent Claim
26 words
The magnet of claim 6, wherein said constant distance between loops of said spiral pattern is defined by the minimum line width divided by approximately four.
Claim 9
Dependent Claim
16 words
The magnet of claim 1, wherein said disk-like substrates have a thickness of about 2-80 mils.
Claim 10
Dependent Claim
35 words
The magnet of claim 1, wherein said disk-like substrates have a diameter in the range of 1 to 12 inches, and each is provided with a bore having a cross-section of 0.1 to 6.0 inches.
Claim 11
Dependent Claim
24 words
The magnet of claim 1, additionally including a layer of buffer material between a surface of the substrate and the deposited pattern of material.
Claim 12
Dependent Claim
33 words
The magnet of claim 1, wherein said disk-like substrates are constructed of material selected from the group consisting of sapphire, strontium titanate, lanthanum aluminate, yttria-stabilized zirconia, cerium oxide, neodymium gallate, and magnesium oxide.
Claim 13
Dependent Claim
47 words
The magnet of claim 11, additionally including a layer of buffer material between the substrate and the deposited pattern of material, said buffer layer material being selected from the group consisting of CeO 2 , LaAlO 3 , SrTiO 3 , MgO and yttria-stabilized Z r O2.
Claim 14
Dependent Claim
49 words
The magnet of claim 12, wherein said disk-like substrate is composed of sapphire having a diameter in the range of 1-12 inches, a thickness in the range of 2-80 mils, and said substrate includes a bore extending there through and having a diameter in the range of 0.1-6.0 inches.
Claim 15
Dependent Claim
23 words
The magnet of claim 13, wherein said buffer layer is composed of CeO 2 having a thickness in the range of 50-1000 Angstroms.
Claim 16
Dependent Claim
54 words
The magnet of claim 14, wherein said substrate has at least four layers of said deposited pattern material on at least one side thereof, and additionally including a layer of buffer material intermediate said layers of deposited pattern material, said layers of said deposited pattern material each having a thickness of about 1 μm.
Claim 17
Dependent Claim
40 words
The magnet of claim 15, wherein each of the layers of deposited pattern material is deposited in a spiral configuration and such that an inner end of the spiral has a greater width than an outer end of the spiral.
Claim 18
Dependent Claim
22 words
The magnet of claim 16, wherein said spiral configuration is formed such that there is a constant distance between adjacent loops thereof.
Claim 19
Dependent Claim
48 words
The magnet of claim 17, wherein said deposited pattern material forming said spiral has a line width in the range of about 5μ to about 5 mm, and wherein the constant spacing between loops of said spiral is determined approximately by the minimum line width divided by 4.
Claim 20
Dependent Claim
17 words
The magnet of claim 18, wherein said plurality of disk-like substrates comprise at least five disk-like substrates.
Claim 21
Dependent Claim
30 words
The magnet of claim 19, additionally including superconducting or highly conductive means for interconnecting said plurality of disk-like substrates and at least interconnecting certain of said deposited patterns of material.
Claim 22
Dependent Claim
115 words
A superconducting magnet including at least five disk-like axially stacked substrates, having bores extending there through, wherein: said substrates being positioned in groups of different thicknesses such that thinner substrates are located in a central axial region; each of said substrates, except an outer two substrates, being provided with at least one layer of YBa 2 Cu 3 O 7-x (YBCO) having a thickness of up to 1 μm on opposite sides thereof; said layer of YBCO defining a spiral configuration having a plurality of loops; at least a layer of insulating material on an outer layer of YBCO; and superconducting means for at least interconnecting certain of said layers of YBCO of said substrates.
Claim 23
Dependent Claim
115 words
A superconducting magnet including at least five disk-like axially stacked substrates, having bores extending there through, wherein: said substrates being positioned in groups of different thicknesses such that thinner substrates are located in a central axial region; each of said substrates, except an outer two substrates, being provided with at least one layer of YBa 2 Cu 3 O 7-x (YBCO) having a thickness of up to 1 μm on opposite sides thereof; said layer of YBCO defining a spiral configuration having a plurality of loops; at least a layer of insulating material on an outer layer of YBCO; and superconducting means for at least interconnecting certain of said layers of YBCO of said substrates.
Claim 24
Dependent Claim
32 words
The superconducting magnet defined in claim 21 wherein, said substrates have a thickness in the range of about 2-40 mils, a diameter of 1-12 inches, and a bore diameter of 0.1-6 inches.
Claim 25
Dependent Claim
37 words
The superconducting magnet defined in claim 22, wherein a layer of buffer material is located intermediate said substrate and said layer of YBCO, said layer of buffer material having a thickness in the range of 50-1000 Å.
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