Crystal structure and superconducting properties of Sc 5 Ir 6 Sn 18
2019
: Sc5Ir6Sn18 crystallizes with a split variant of the Tb5Rh6Sn18 structure type (space group I41/acd, [Formula: see text] [Formula: see text], [Formula: see text] [Formula: see text]). DFT calculations confirmed the instability of the structural arrangement with the fully occupied and unsplit crystallographic sites. High quality single crystals were grown from a Sn melt. Sc5Ir6Sn18 is a diamagnetic metal showing a superconducting transition at a critical temperature [Formula: see text] K. The relatively low critical magnetic field [Formula: see text] 3.2 T as well as the obtained values of the specific heat ratio [Formula: see text] and energy-gap ratio [Formula: see text] suggest this system to be a weakly coupled BCS-like superconductor.
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