Coexistence of magnetic order and superconductivity in RbEuFe<sub>4</sub>As<sub>4</sub> according to high-resolution magnetic x-ray scattering studies
ORAL
Abstract
Superconductivity (SC) and the presence of ordered magnetic moments are in general antagonistic. Nonetheless, when a material is forced to accommodate these apparently incompatible order parameters it may exhibit subtle organization of these phases, in the form of "cryptomagnetism", FFLO, and spontaneous vortex states. In-depth experimental studies of such inhomogeneous phases have been rather challenging. Here we present a superconductor, RbEuFe4As4, with intertwined magnetic and superconducting properties ideally suited for magnetic x-ray scattering (MXS) studies. These diffraction studies revealed a long-range, fully coherent, and three-dimensionally ordered magnetic phase. This phase corresponds to a long-range order of Eu moments below the Néel temperature of ~15K. Magnetization measurements confirmed a full ionic moment of Eu coexisting with SC. MXS results of the magnetic structure, its correlation, and order parameter will be presented.
*This research used resources of the Advanced Photon Source, a U.S. Department of Energy Office of Science User Facility operated for the DOE Office of Science by Argonne National Laboratory under Contract No. DE-AC02-06CH11357 and was supported in part by Materials Sciences and Engineering Division.
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Presenters
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Zahirul Islam
- Argonne Natl Lab
- X-ray Science Division, Argonne National Laboratory
- Advanced Photon Source, Argonne National Laboratory
- Argonne National Laboratory