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Competing superconducting and magnetic order parameters and field-induced magnetism in electron-doped $\mathrm{Ba}{({\mathrm{Fe}}_{1\ensuremath{-}x}{\mathrm{Co}}_{x})}_{2}{\mathrm{As}}_{2}$

Larsen, J. ; Mencia Uranga, B. ; Stieper, G. ; Holm, S. L. ; Bernhard, Christian ; Wolf, T. ; Lefmann, K. ; Andersen, B. M. ; Niedermayer, Christof

In: Physical Review B, 2015, vol. 91, no. 2, p. 024504

We have studied the magnetic and superconducting properties of Ba(Fe0.95Co0.05)2As2 as a function of temperature and external magnetic field using neutron scattering and muon spin rotation. Below the superconducting transition temperature the magnetic and superconducting order parameters coexist and compete. A magnetic field can significantly enhance the magnetic scattering in the superconducting...