Abstract
We have studied the interplay of magnetism and superconductivity in and . While antiferromagnetic spin-density wave formation is suppressed and superconductivity evolves, all samples show a doping-independent strong increase in the normal-state susceptibility upon heating which appears a general feature of iron pnictides. The data provide evidence for robust local antiferromagnetic correlations persisting even in the superconducting regime of the phase diagram.
- Received 5 August 2008
DOI:https://doi.org/10.1103/PhysRevB.81.024506
©2010 American Physical Society