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Neutron Investigation of the Magnetic Scattering in an Iron-based Ferromagnetic Superconductor



Jeffrey W. Lynn, Xiuquan Zhou, Christopher K. H. Borg, Shanta R. Saha, Johnpierre Paglione, Efrain E. Rodriguez


Neutron diffraction and small angle scattering experiments have been carried out on the double-isotopic polycrystalline sample (7Li0.82Fe0.18OD)FeSe. Profile refinements of the diffraction data of a=3.7827 A and c=9.1277 A at 4 K, in the ferromagnetic-superconductor regime, with a bulk superconducting transition of Tc = 18 K. Small angle neutron scattering (SANS) measurements in zero applied field reveal the onset of ferromagnetic order below TF {approximately equal to}12.5 K, with a wave vector and temperature dependence consistent with an inhomogeneous ferromagnetic of vortices or domains in a mixed state. No oscillatory ordered magnetic state is observed. Field dependent occurs at the expected wave vector. The temperature dependence of the vortex scattering does not indicate any contribution from the ferromagnetism, consistent with diffraction data that indicate that the ordered moment is quite small.
Physical Review B


Iron-based superconductor, ferromagnet, vortex lattice, neutron scattering


Lynn, J. , Zhou, X. , H., C. , , S. , Paglione, J. and , E. (2015), Neutron Investigation of the Magnetic Scattering in an Iron-based Ferromagnetic Superconductor, Physical Review B, [online], (Accessed March 4, 2024)
Created August 31, 2015, Updated February 19, 2017