Coexistence of spin-glass freezing and heavy-fermion superconductivity in Ce1−x
GdxCu2.2Se2

Spille, H.; Winkelmann, M.; Ahlheim, U.; Bredl, C. D.; Steglich, F.; Haen, P.; Mignot, J. M.; Tholence, J. L.; Tpurnier, R.

doi:10.1016/0304-8853(88)90481-7

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Coexistence of spin-glass freezing and heavy-fermion superconductivity in Ce_1−xGd_xCu_2.2Se₂

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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 Ce_1−xGd_xCu_2.2Se₂. Journal of Magnetism and Magnetic Materials, 76-7, 539-541. doi:10.1016/0304-8853(88)90481-7.

Cite as: https://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.