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Coexistence of spin-glass freezing and heavy-fermion superconductivity in Ce1−xGdxCu2.2Se2

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Citation

Spille, H., Winkelmann, M., Ahlheim, U., Bredl, C. D., Steglich, F., Haen, P., et al. (1988). Coexistence of spin-glass freezing and heavy-fermion superconductivity in Ce1−xGdxCu2.2Se2. Journal of Magnetism and Magnetic Materials, 76-7, 539-541. doi:10.1016/0304-8853(88)90481-7.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0019-D4AE-3
Abstract
In Ce1−xGdxCu2.2Si2 spin-glass ordering coexists superconductivity below the “critical” (Tc → 0) concentration xcr = 5.1 at%. For samples with slightly lower Gd content, a small volume fraction of ⋍ 10% remains superconducting presumably due to demagnetizing effects. Thus, the full Tc(x) dependence is accessible. It closely follows the AG-result and proves the existence of a “paramagnetic” pair-breaking mechanism.