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- W2014130425 abstract "Some high-Tc superconductors REBa2Cu3O9−y (RE = Sm, Eu, Gd, Dy, Ho, Er, Tm) are prepared and their zero-resistance temperatures Tce are about 90 K. The effect of magnetic rare earth ions on the transition temperatures is not very great but their magnetic behaviours are different from one another. The magnetization loops of these compounds are measured at 77 K. The coexistence of superconductivity with magnetic ordering (COSM) occurs in the samples of RE = Gd, Dy, Ho, Er, Tm, which predictes that there are two possible ways of coexistence in the samples. The experiments show that the relation of paramagnetism to the atomic number of rare earth elements for these superconductors is similar to that of rare earth ions in some paramagnetic salt crystals, which indicates that the magnetism of the samples originates from the local magnetic moments of rare earth ions. Some samples show antiferromagnetic ordering at low temperature, and the effective Bohr magneton numbers are consistence with that of free rare earth ions. Es werden Hoch-Tc-Supraleiter REBa2Cu3O9−y (Re = Sm, Eu, Gd, Dy, Ho, Er, Tm) mit Nullwiderstandstemperaturen Tce von etwa 90 K präpariert. Der Einfluß der magnetischen Seltenerdionen auf die Übergangstemperaturen ist nicht sehr groß, jedoch unterscheidet sich ihr magnetisches Verhalten voneinander. Die Magnetisierungsschleifen dieser Verbindungen werden bei 77 K gemessen. Koexistenz der Supraleitung mit magnetischer Ordnung (COSM) tritt in den Proben von RE = Gd, Dy, Ho, Er, Tm auf, was zeigt, daß es zwei mögliche Wege der Koexistenz in den Proben gibt. Die Experimente zeigen, daß die Beziehung des Paramagnetismus zur Atomzahl der Seltenerdelemente für diese Supraleiter ähnlich der der Seltenerdionen in einigen paramagnetischen Kristallen ist, was zeigt, daß der Magnetismus der Proben aus den lokalen magnetischen Momenten der Seltenerdionen stammt. Einige Proben zeigen antiferromagnetische Ordnung bei tiefen Temperaturen, und die effektiven Bohrschen-Magneton-Zahlen sind mit denen der freien Seltenerdionen konsistent." @default.
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- W2014130425 date "1988-07-16" @default.
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- W2014130425 title "Magnetic and superconducting properties of REBa2Cu3O9−y (RE = Sm, Eu, Gd, Dy, Ho, Er, Tm)" @default.
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- W2014130425 doi "https://doi.org/10.1002/pssa.2211080135" @default.
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