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Catrin Löhnert, Tobias Stürzer, Dr. Marcus Tegel, Rainer Frankovsky, Gina Friederichs and Prof. Dr. Dirk Johrendt Superconductivity up to 35 K in the Iron Platinum Arsenides (CaFe1−xPtxAs)10Pt4−yAs8 with Layered Structures Angewandte Chemie International Edition 50

Article first published online: 24 AUG 2011 | DOI: 10.1002/anie.201104436

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The family of iron arsenide superconductors is expanded by the new iron platinum compounds (CaFe1−xPtxAs10)Pt4−yAs8 with novel crystal structures. Layers of FeAs4/4 tetrahedra and of nearly planar PtAs4/2 squares with (As2)4− dumbbells are stacked in different ways, resulting in polytypes with triclinic or tetragonal symmetry. Superconductivity up to 35 K is induced either by Pt doping of the Fe site or by electron transfer from PtAs to FeAs layers.

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