Evidence for Coexistence of Bulk Superconductivity and Itinerant Antiferromagnetism in the Heavy Fermion System CeCo(In1-xCdx)(5)

Abstract : In the generic phase diagram of heavy fermion systems, tuning an external parameter such as hydrostatic or chemical pressure modifies the superconducting transition temperature. The superconducting phase forms a dome in the temperature-tuning parameter phase diagram, which is associated with a maximum of the superconducting pairing interaction. Proximity to antiferromagnetism suggests a relation between the disappearance of antiferromagnetic order and superconductivity. We combine muon spin rotation, neutron scattering, and x-ray absorption spectroscopy techniques to gain access to the magnetic and electronic structure of CeCo(In1-xCdx) 5 at different time scales. Different magnetic structures are obtained that indicate a magnetic order of itinerant character, coexisting with bulk superconductivity. The suppression of the antiferromagnetic order appears to be driven by a modification of the bandwidth/carrier concentration, implying that the electronic structure and consequently the interplay of superconductivity and magnetism is strongly affected by hydrostatic and chemical pressure.
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Scientific Reports, Nature Publishing Group, 2015, 5, pp.12528. 〈10.1038/srep12528〉
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https://hal.archives-ouvertes.fr/hal-01611024
Contributeur : Jérôme Planès <>
Soumis le : jeudi 5 octobre 2017 - 12:34:44
Dernière modification le : mardi 17 avril 2018 - 20:42:02

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Ludovic Howald, Evelyn Stilp, Pierre Reotier, Alain Yaouanc, Stéphane Raymond, et al.. Evidence for Coexistence of Bulk Superconductivity and Itinerant Antiferromagnetism in the Heavy Fermion System CeCo(In1-xCdx)(5). Scientific Reports, Nature Publishing Group, 2015, 5, pp.12528. 〈10.1038/srep12528〉. 〈hal-01611024〉

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