ISSN:
1572-9605
Schlagwort(e):
YBa2Cu3O7−x
;
lithium halides
;
LiF
;
LiCl
;
superconductivity
Quelle:
Springer Online Journal Archives 1860-2000
Thema:
Elektrotechnik, Elektronik, Nachrichtentechnik
,
Physik
Notizen:
Abstract The effects of addition to YBa2Cu3O7−x of lithium halides (YBa2Cu3O7−x (LiF) y , and YBa2Cu3O7−x (LiCl) y ) on the structural, electric, magnetic, and transport properties are analyzed. Both structural and superconducting properties depend weakly on the lithium content up to y= 0.10. The critical temperature keeps on a value well above 91 K for a small amount of lithium halide (reaching 93.48K. for y= 0.02 in YBa2Cu3O7−x (LiF) y and 91.30 K in YBa2Cu3O7−x (LiCl) y ), but for higher concentration of Li it rapidly decreases (81.68K for y= 0.20). The same behavior is exhibited in the lower intragranular critical field. The intragranular critical current density depends on the magnetic field as a power law:j c∝B −α, with a lithium-concentration-dependent α. The voltage–current characteristics follow a law typical for granular superconductors, V∝(I−I c(B,T)) n(B,T). The dependence of the intergranular critical current, I c, and of the exponent, n, on temperature, magnetic field, and concentration is analyzed.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1023/A:1022664300837
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