The normal state and superconducting properties are investigated in the phase diagram of KxSr1-xFe2As2 for 0 ≤ x ≤ 1. The ground state upper critical field, Hc2(0), is extrapolated from magnetic field-dependent resistivity measurements. H c2(0) scales with the critical temperature, Tc, of the superconducting transition. In the normal state, the Seebeck coefficient is shown to experience a dramatic change near a critical substitution of x ∼ 0.3. This is associated with the formation of a spin density wave state above the superconducting transition temperature. The results provide strong evidence for the reconstruction of the Fermi surface with the onset of magnetic order.
All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)