Patent ID: 6767866
Filing Date: 2004-07-27
Classification: H01L

Abstract:
A selective reduction type high temperature superconductor, characterized in that the high temperature superconductor has a unit cell that comprises a pair of charge supply layers formed by an upper and a lower surface thereof having each of a portion of Cu atoms substituted with a selectively reducible atom, and superconducting layers as layers other than said charge supply layers, wherein said charge supply layers have said selectively reduced atoms selectively reduced, characterized in that the superconductor is made of a (Cu, M) family high temperature superconducting material that can be described by composition formula:Cu1âˆ’xMx(Ba1âˆ’y,Sry)2(Ca1âˆ’zLz)nâˆ’1CunO2n+4âˆ’w where M represents ions of one or more polyvalent metallic elements selected from the class which consists of Tl, Bi, Pb, In, Ga, Sn, Ti, V, Cr, Mn, Fe, Co, Ni, Zr, Nb, Mo, W, Re and Os; L represents one or more elements selected from the class which consists of Mg and alkaline metallic elements; 0&lE;x&lE;1.0; 0&lE;y&lE;1; 0&lE;z&lE;1; 0&lE;w&lE;4; and 1&lE;n&lE;16.