ENHANCED Tc OF FILMS OF La-Ba-Cu-O TYPE COMPOUNDS
Original Publication Date: 1989-Jun-01
Included in the Prior Art Database: 2005-Jan-28
The largest observed increase in Tc with hydrostatic pressure for narrow band transition metals superconductors is 11.3K for lanthanum. The change is explained semi-quantitatively in terms of the electron- phonon interaction in narrow-band metals and depends on such factors as the compressibility and structural instabilities in the metal. The largest increase in Tc ( 13K) with hydrostatic pressure (10 kb or 1010 dynes/cm2) for a compound was reported for the superconductor, (La1-xBax)2CuO4-y . Presumably, even higher Tc values are obtained if strontium is substituted for barium.