Absence of Meissner state in RuSr sub(2)GdCu sub(2)O sub(8)

Absence of Meissner state in RuSr sub(2)GdCu sub(2)O sub(8)

The magnetization of single-phased Ru-1212, which possesses a ferromagnetic transition at 133 K and a superconducting transition around 30 K, was measured. No bulk Meissner effect can be detected down to 2 K and 0.2 Oe, although both a diagmagnetic susceptibility -4 pi Chi greater than or equal to 1...

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Veröffentlicht in:Physica. C, Superconductivity Superconductivity, 2000-01, Vol.341-348 (I), p.459-460
Hauptverfasser: Xue, Y Y, Meng, R L, Cmaidalka, J, Lorenz, B, Desaneti, L M, Heilman, A K, Chu, C W
Format: Artikel
Sprache:eng
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Zusammenfassung:The magnetization of single-phased Ru-1212, which possesses a ferromagnetic transition at 133 K and a superconducting transition around 30 K, was measured. No bulk Meissner effect can be detected down to 2 K and 0.2 Oe, although both a diagmagnetic susceptibility -4 pi Chi greater than or equal to 1 in the zero-field-cooled mode and a small M-drop in the field-cooled mode appear. Almost the same reversible magnetizations in Ru-1212 and Zn-doped Ru-1212 further suggest that the superconducting state of Ru-1212 is severely modified by the coexistence of ferromagnetism.
ISSN:0921-4534