Coexistence of ferromagnetism and superconductivity in the hybrid ruthenate-cuprate compound RuSr_2GdCu_2O_8 studied by muon spin rotation (μSR) and DC-magnetization

C. Bernhard; J. L. Tallon; Ch. Niedermayer; Th. Blasius; A. Golnik; E. Brücher; R. K. Kremer; D. R. Noakes; C. E. Stronach; E. J. Ansaldo

doi:10.1103/physrevb.59.14099

arXiv · cond-mat/9901084

Coexistence of ferromagnetism and superconductivity in the hybrid ruthenate-cuprate compound RuSr_2GdCu_2O_8 studied by muon spin rotation (μSR) and DC-magnetization

C. Bernhard·J. L. Tallon·Ch. Niedermayer·Th. Blasius·A. Golnik·E. Brücher·R. K. Kremer·D. R. Noakes·C. E. Stronach·E. J. Ansaldo

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Abstract

We have investigated the magnetic and the superconducting properties of the hybrid ruthenate-cuprate compound RuSr_{2}GdCu_{2}O_{8} by means of zero-field muon spin rotation- (ZF-$μ$SR) and DC magnetization measurements. The DC-magnetisation data establish that this material exhibits ferromagnetic order of the Ru-moments ($μ(Ru) \approx 1 μ_{B}$) below T_{Curie} = 133 K and becomes superconducting at a much lower temperature T_c = 16 K. The ZF-$μ$SR experiments indicate that the ferromagnetic phase is homogeneous on a microscopic scale and accounts for most of the sample volume. They also suggest that the magnetic order is not significantly modified at the onset of superconductivity.

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C. Bernhard, J. L. Tallon, Ch. Niedermayer, Th. Blasius, A. Golnik, E. Brücher, R. K. Kremer, D. R. Noakes, C. E. Stronach, E. J. Ansaldo. 1999-02-22. Coexistence of ferromagnetism and superconductivity in the hybrid ruthenate-cuprate compound RuSr_2GdCu_2O_8 studied by muon spin rotation (μSR) and DC-magnetization. https://doi.org/10.1103/physrevb.59.14099

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