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Crystal structure and superconducting properties of Sc5Ir6Sn18

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Feig,  Manuel
Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Akselrud,  Lev
Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Schnelle,  Walter
Walter Schnelle, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Leithe-Jasper,  Andreas
Andreas Leithe-Jasper, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Gumeniuk,  Roman
Roman Gumeniuk, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Citation

Levytskyi, V., Feig, M., Akselrud, L., Schnelle, W., Leithe-Jasper, A., Dyadkin, V., et al. (2019). Crystal structure and superconducting properties of Sc5Ir6Sn18. Journal of Physics: Condensed Matter, 31(44): 445603, pp. 1-9. doi:10.1088/1361-648X/ab32d0.


Cite as: http://hdl.handle.net/21.11116/0000-0004-88B4-7
Abstract
Sc5Ir6Sn18 crystallizes with a split variant of the Tb5Rh6Sn18 structure type (space group I4(1)/acd, a = 13.5826(2) angstrom, c = 27.1504(6) angstrom). 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 T-c = 2.64 K. The relatively low critical magnetic field B-c2(0) approximate to 3.2 T as well as the obtained values of the specific heat ratio Delta c(p)/gamma T-N(c) = 1.73(3) and energy-gap ratio Delta(0)/k(B)T(c) = 1.85(1) suggest this system to be a weakly coupled BCS-like superconductor.