Exploring the Fragile Antiferromagnetic Superconducting Phase in CeCoIn5

E. Blackburn; P. Das; M. R. Eskildsen; E. M. Forgan; M. Laver; C. Niedermayer; C. Petrovic; J. S. White

doi:10.1103/PhysRevLett.105.187001

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Exploring the Fragile Antiferromagnetic Superconducting Phase in CeCoIn5

E. Blackburn, P. Das, M. R. Eskildsen, E. M. Forgan, M. Laver, C. Niedermayer, C. Petrovic, J. S. White

DOI 10.1103/PhysRevLett.105.187001 · Physical Review Letters

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Abstract

CeCoIn5 is a heavy fermion type-II superconductor showing clear signs of Pauli-limited superconductivity. A variety of measurements give evidence for a transition at high magnetic fields inside the superconducting state, when the field is applied either parallel to or perpendicular to the c axis. When the field is perpendicular to the c axis, antiferromagnetic order develops on the high-field side of the transition. This order remains as the field is rotated out of the basal plane, but the associated moment eventually disappears above 17°, indicating that anomalies seen with the field parallel to the c axis are not related to this magnetic order. We discuss the implications of this finding.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
CeCoIn5 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	2.3	Pressure unresolved	unknown