The Magnetic Behavior of Superconductors of Negative Surface Energy

Abstract

Abrikosov and the author have separately suggested that a new type of reversible magnetic behavior is to be expected in superconductors whose coherence length is small compared with their penetration depth. The treatments of these two authors are shown to lead to similar results for pure metals and to only slightly different results for alloys. The experimental evidence in favor of a new type of reversible magnetic behavior in superconductors is discussed.

Die elektrischen Eigenschaften des Kondo-Supraleiters (La, Ce)Al2

“…Fiir reine LaAl2-Proben mit pR=0,3 bis 10 Ilf~ cm variiert He2(0 ) zwischen 1,0 und 2,5 kOe [7,32]. Hc2(0 ) ist nicht proportiona/zu PR, da der schmutzige Grenzfall, in dem die Goodman-Gorkov-Beziehung [33] gilt, erst fiir pR=>2 pf~ cm erreicht wird. Das reduzierte kritische Feld h(T)= Hc2 (T, p, c)/H~2 (0, p, 0) sollte dagegen weitgehend unabh/ingig vom Restwiderstand sein [34].…”

Dimethyl Sulfoxide and Dogs

“…A reasonable estimate for the coherence length for these particles of U(CNO), if they become svperconducting below 1 OK, is about 100 A (9). If this is the case, no superconductivity should be observed in the quenched condition, and in that the particles are so far apart in the slow-cooled or annealed conditions, no bulk superconductivity effect should be observed there either.…”

Type II superconductors are 70 years old

“…in 1962, Abrikosov's work was brought to attention by B.B. Goodman [8] Shubnikov". The significance of the work [1] was also noted in the reports of such authoritative scientists as C.J.…”