A Possible Crypto-Superconducting Structure in a Superconducting Ferromagnet

Details A Possible Crypto-Superconducting Structure in a Superconducting Ferromagnet A Possible Crypto-Superconducting Structure in a Superconducting Ferromagnet

2000-02-14

arxiv.org/abs/cond-mat/0002212v1

Physica C 335, 231 (2000)

Physics

Condensed Matter

Superconductivity

8 pages, 5 PNG figures, submitted to Proceedings of the 9th Japan-US Workshop on High-Tc Superconductors, Yamanashi, Japan, Oc

Scientific paper

10.1016/S0921-4534(00)00176-3

We have measured the dc and ac electrical and magnetic properties in various magnetic fields of the recently reported superconducting ferromagnet RuSr2GdCu2O8. Our reversible magnetization measurements demonstrate the absence of a bulk Meissner state in the compound below the superconducting transition temperature. Several scenarios that might account for the absence of a bulk Meissner state, including the possible presence of a sponge-like non-uniform superconducting or a crypto-superconducting structure in the chemically uniform Ru-1212, have been proposed and discussed.

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