Flux pinning in superconducting cuprates

Details Flux pinning in superconducting cuprates Flux pinning in superconducting cuprates

1992-03-18

1994-08-23

Lieberman, Paul

Superconductor technology: apparatus, material, process

Processes of producing or treating high temperature...

Heating, annealing, or sintering

252518, 252521, 505125, 505126, H01B 108, H01B 1200

Patent

active

053407946

ABSTRACT:
The invention comprises a process of heat treatment to produce a high T.sub.c superconductor with increased flux pinning. A precursor compound is subjected to temperature and oxygen pressure conditions at which the precursor compound decomposes or converts partially or completely to the high T.sub.c superconductor and precipitated non-superconducting compounds which are dispersed through the structure of the high T.sub.c superconductor and which are effective to pin lines of magnetic flux. The precursor compound may or may not itself be a high T.sub.c superconductor. In the YBCO system, 2-4-7 may be converted to 1-2-3 or 1-2-3 to 2-4-7 and flux pinning copper oxides dispersed through the structure, for example, various other transformations are possible.

REFERENCES:
patent: 4956336 (1990-09-01), Salama et al.
patent: 5024992 (1991-06-01), Morris
patent: 5077272 (1991-12-01), Chen et al.
patent: 5084436 (1992-01-01), Morimoto et al.
Beeli et al. "Crystal Structure of a new Superconducting High-Pressure Phase in the YBaCrO-System" Cond. Matter 73, 313-319 (1988).
Bordet et al. "Structure Determination of the New High Tc Superconductor Y.sub.2 Ba.sub.4 Cu.sub.7 O.sub.14+x " Nature vol. 334, Aug. 18, 1988.
Saito et al, "High-Tc Superconducting Properties in (Y.sub.1-x Tl.sub.x)Ba.sub.2 Cu.sub.3 O.sub.7.delta.. . . ", Physica 148B pp. 336-338 (1987).
Kumakura et al, "Large Magnetization in YBa.sub.2 Cu.sub.3 O.sub.7 Prepared by Sintering at High-Temperature", Jap. Jrnl. App. Phys. vol. 27, No. 2, Feb. 1988.
Frase et al, "Phase Compatibilities in the System Y.sub.2 O.sub.3 --BaO--CuO", Adv. Cer. Mat. vol. 2, No. 3B (1987).
Chen et al, "Superconductivity and the Tailoring of Lattice Parameters of the Compound YBa.sub.2 Cu.sub.3 O.sub.x " Adv. Cer. Mat. vol. 2, No. 3B (1987).
Iguchi et al, "Structural and Superconducting Properties of YBa.sub.2 Cu.sub.3 O.sub.7-.delta. Formed Under Oxygen Pressure Control", Jap. Jrnl. App. Phys. vol. 27, No. 6, Jun. 1988.
Hauck et al, "Oxygen Content of Superconducting Ba.sub.2 YCu.sub.3 O.sub.6.5+x," Z. Phys. B-Cond. Matter vol. 67 pp. 299-302 (1987).
Kishio et al, "Determination of Oxygen Nonstoichiometry in a High-Tc Superconductor Ba.sub.2 YCu.sub.3 O.sub.7-.delta. ", Jap. Jrnl. App. Phys. vol. 26, No.7 pp. L1228-L1230, Jul. 1987.
Xiao et al., "Flux Pinning and Critical Current Density in Y--Ba--Cu--O Superconductors", Phys. Rev. B vol. 36(4) pp. 2382-2385, Aug. 1, 1987.
Sawano et al., "Effects of Synthesis Conditions on Microstructure . . . ", Nippon Ser. Ky. Gak. Ron. 97(10), pp. 1028-1033, 1989.
Dinger et al., "Direct Observation of Electronic Anisotropy in Single-Crystal Y.sub.1 Ba.sub.2 Cu.sub.3 O.sub.7-x " Phys. Rev. Let. vol. 58(25) pp. 2687-2690, Jun. 22, 1987.
S. Jin et al., "Enhanced flux pinning by phase decomposition in Y--Ba--Cu--O", Appl. Phys. Lett 56 (13), Mar. 26, 1990.

Affiliated with

Also associated with

Rating

Flux pinning in superconducting cuprates does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Flux pinning in superconducting cuprates, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Flux pinning in superconducting cuprates will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-503008