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Direct Observation of Coexistence of Ferromagnetism and Superconductivity in RuSr2(Gd0.7Ce0.3)2Cu2O10

S. Y. Chen·J. Shulman·Y. S. Wang·D. H. Cao·C. Wang·Q. Y. Chen·T. H. Johansen·W. K. Chu·C. W. Chu
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Abstract

Recent reports of the detecting of ferromagnetism and superconductivity in ruthenium-cuprates have aroused great interest. Unfortunately, whether the two antagonistic phenomena coexist in the same space in the compounds remains unresolved. By employing the magneto-optical-imaging technique, ferromagnetism and superconductivity were indeed directly observed to coexist in the same space in RuSr2(Gd0.7Ce0.3)2Cu2O10 within the experimental resolution of ~ 10 (mu)m. The observation sets a length scale limit for models proposed to account for the competition between ferromagnetism and superconductivity, especially d-wave superconductivity, in this interesting class of compounds.

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S. Y. Chen, J. Shulman, Y. S. Wang, D. H. Cao, C. Wang, Q. Y. Chen, T. H. Johansen, W. K. Chu, C. W. Chu. 2001-05-26. Direct Observation of Coexistence of Ferromagnetism and Superconductivity in RuSr2(Gd0.7Ce0.3)2Cu2O10. https://arxiv.org/abs/cond-mat/0105510

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