SuperconductivityVersusFerromagnetism in Lanthanum-Gadolinium Alloys

Superconducting phases off-electron compounds

“…In contrast to a purely competitive form of superconductivity and magnetism doping studies in the series Ce 1−x Gd x Ru 2 also suggested the possibility of a coexistence of superconductivity and magnetism in small parameter regimes (Hein et al, 1959;Matthias et al, 1958a;Phillips and Matthias, 1961). By the late 1970s two series of compounds had been discovered, which display such an extremely delicate balance of superconductivity and magnetism intrinsically, notably the series RRh 4 B 4 where R is a rare earth and the Chevrel phases such as DyMo 6 S 8 (Bulaevskii et al, 1985;Fertig et al, 1977;Ishikawa and Fischer, 1977;Moncton et al, 1977).…”

Magnetic Impurities in Nonmagnetic Metals

“…The integrals with this function are evaluated in accordance with the rule if the function F varies slowly in the vicinity of e = 0. As applied to formula (23), this rule yields…”

Coexistence of Antiferromagnetism and Superconductivity

“…1, their results for T 0 differ slightly depending on the method of measurement. The solid line was determined from the peak of the differential magnetization curves, 3 nence, the ordering was identified as ferromagnetic. The purpose of this note is to present magnetization data for LaGd alloys which indicate that the ordering in low applied fields is not ferromagnetic but is a helical or other antiferromagnetic structure.…”

“…1, these results are in excellent agreement with the differential magnetization results of Hein and Matthias. 3 A large external field will destroy the antiferromagnetism and drive the ions to a ferromagnetic alignment. In this experiment we are limited to fields less than 4000 Oe but we can begin to see the transformation.…”