Insulating composition

Details Insulating composition Insulating composition

1991-05-08

1994-12-20

Bell, Mark L.

Beds

Bedsteads

Having bottom

428930, 505120, 505121, 505125, 505191, 505238, 505239, 505701, 505702, 505782, H01B 1206, H01L 3912

Patent

active

053746104

ABSTRACT:
An insulating composition consisting of Bi, Sr, RE, Cu, O or of Tl, Ba, RE, Cu, O (wherein; RE is an element selected from a group consisting of Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu and Y) aligns properly with a crystal face of an oxide superconductor because its crystal structure is the same as or similar to that of the oxide superconductor. An insulating composition in which a part of Bi is replaced by Pb is further near the oxide superconductor its construction, and the modulation structure in this insulating composition is mitigated or disappears.

REFERENCES:
patent: 4957900 (1990-09-01), Yamazaki
patent: 4968664 (1990-11-01), Sugihara et al.
patent: 4980339 (1990-12-01), Setsune et al.
patent: 5047390 (1991-07-01), Higashino et al.
patent: 5106823 (1992-04-01), Creuzet et al.
Nature, vol. 332, Mar. 31, 1988, pp. 420-422; "Crystal Structure of the High-Temperature Superconductor Tl.sub.2 Ba.sub.2 CaCu.sub.2 O.sub.8 ", Subramanian et al.
Journal of Solid State Chemistry, vol. 77, 1988, pp. 196-199; "Superconductor-to-Insulator Transition in the Bi.sub.2 Sr.sub.3-x Y.sub.x Cu.sub.2 O.sub.8+y System", Subramanian et al.
Journal of Solid State Chemistry, vol. 80, 1989, pp. 156-160; "Superconducting and Nonsuperconducting Analogs of Bi.sub.2 Sr.sub.2 CaCu.sub.2 O.sub.8 : The Role of Electronegativity", Gopalakrishnan et al.
Japanese Journal of Applied Physics, vol. 27, No. 8, Aug. 1988, pp. L1432-L1434; "Electrical and Magnetic Properties in Bi.sub.2 Sr.sub.2 Ca.sub.1+x Y.sub.x Cu.sub.2 O .sub.8+.delta. ", Fukushima et al.
Japanese Journal of Applied Physics, vol. 27, No. 6, Jun. 1988, pp. L1074-L1076; "Characterization of a Non-Superconducting Cuprate, Bi.sub.2 Sr.sub.2 YCu.sub.2 O.sub.8.5 ", Tamegai et al.
Japanese Journal of Applied Physics, vol. 27, No. 5, May 1988, pp. L790-L791; "Transition to an Insulator from a Superconductor Due to Substitution of Ca by Rare-Earth Elements in Bi.sub.4 Sr.sub.4 RE.sub.2 Cu.sub.4 O.sub.16+.delta. (RE=Nd, Eu, Y)", Fukushima et al.
Physical Review B, vol. 38, No. 10, Oct. 1, 1988, pp. 6531-6537; "Model Family of High-Temperature Superconductors: Tl.sub.m Ca.sub.n-1 Ba.sub.2 Cu.sub.n O.sub.2(n+1)+m (m=1,2; n=1,2,3)", Parkin et al.
Physical Review B, vol. 37, No. 16, Jun. 1, 1988, pp. 9382-9389; "Crystal Substructure and Physical Properties of the Superconducting Phase Bi.sub.4 (Sr,Ca).sub.6 Cu.sub.4 O.sub.16+x ", Tarascon et al.
Physica, vol. 156, 1988, pp. 97-102; "Rietveld Analysis of Tl.sub.2 Ba.sub.2 Ca.sub.n-1 Cu.sub.n O.sub.4+2n (n=1, 2 and 3) By Powder X-Ray Diffraction", Shimakawa et al.
Keimer et al, "Neel Transition and Sublattice Magnetization or Pure and Doped La.sub.2 CuO.sub.4 "Phys Rev. B, vol. 45 #13, pp. 7430-7435; 1, Apr. 1992.

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