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Electronic and structural properties of palladium-based Heusler superconductors

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Winterlik, J., Fecher, G. H., & Felser, C. (2008). Electronic and structural properties of palladium-based Heusler superconductors. Solid State Communications, 145(9-10), 475-478. doi:10.1016/j.ssc.2007.12.020.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0018-89CC-F
Abstract
This work reports on superconductivity in the Heusler compounds Pd2ZrAl and Pd2HfAl. Magnetisation and resistance measurements were carried out to verify their superconducting states. The compounds exhibit transition temperatures of 3.2 K (Zr) and 3.4 K (Hf). From their behaviour in external magnetic fields, it was determined that both compounds are type 11 superconductors. Similar to the half-metallic ferromagnets, the superconducting Heusler compounds follow an electron counting scheme based on theoretical considerations. As found from ab initio calculations, the superconductivity can be explained by a valence instability at the L-point, that has been used as design criterion. (C) 2007 Elsevier Ltd. All rights reserved.