Superconducting materials including La-Sr-Nb-O, Y-Ba-Nb-O, La-Sr-Nb-Cu-O, and Y-Ba-Nb-Cu-O
AssigneeHitachi, Ltd.
InventorsTetsuya Ogushi, Yoshinori Hakuraku, Hisanao Ogata
Life of this patent
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Abstract
Oxide materials of (L.sub.x A.sub.1-x).sub.i MO.sub.y, (L.sub.x A.sub.1-x).sub.i M.sub.1-z Cu.sub.z O.sub.y and (L.sub.x A.sub.1-x).sub.i MO.sub.j-.delta. G.sub.k, wherein L is Sc, Y, lanthanides, etc.; A is Ba, Sr. Ca, etc.; M is V, Nb, Ta, T, Zr or Hf; 0<x<1; 0<z<1; i=1, 3/2 or 2; 0<y.ltoreq.4; Gis F, Cl or N; .delta. is oxygen defect, and having a perovskite-like crystal structure, show superconductivity at a temperature higher than the liquid nitrogen temperature.
Claims5
A superconducting material which is (La.sub.0.5 Sr.sub.0.5).sub.2 NbO.sub.y, wherein y is about 4.
A superconducting material which is represented by the formula:
- (La.sub.x Sr.sub.1-x).sub.i NbO.sub.y
- wherein x is 0<x<1;
- i is 1, 3/2 or 2 and y is 0<y.ltoreq.3 in the case of i=1 or 0<y .ltoreq.4 in the case of i=3/2 or 2.
A superconducting material which is represented by the formula:
- (Y.sub.x Ba.sub.1-x).sub.i NbO.sub.y
- wherein x is 0<x<1;
- i is 1, 3/2 or 2 and y i 0<y.ltoreq.3 in the case of i=1 or 0<y.ltoreq.4 in the case of i=3/2 or 2.
A superconducting material which is represented by the formula:
- (La.sub.x Sr.sub.1-x).sub.i Nb.sub.1-z Cu.sub.z O.sub.y
- wherein x is 0<x<1;
- z is 0<z<1;
- is 1, 3/2 or 2 and y is 0<y.ltoreq.3 in the case of i=1 or 0<y.ltoreq.4 in the case of i=3/;2 or 2.
A superconducting material which is represented by the formula:
- (Y.sub.x Ba.sub.1-x).sub.i Nb.sub.1-z Cu.sub.z O.sub.y
- wherein x is 0<x<1;
- z is 0<z<1;
- i is 1, 3/2 or 2 and y is 0<y.ltoreq.3 in the case of i=1 or 0<y.ltoreq.4 in the case of i=3/2 or 2.
Dependencies are inferred from the claim text.