Abstract
We report the synthesis, crystal structure, and physical properties of two new high-entropy silicides (HESs), namely and . Structural analysis indicates that both HESs consist of a (nearly) single tetragonal -type phase (space group ) with a disordered cation distribution. Electrical resistivity, magnetic susceptibility, and specific heat measurements show that and are weakly coupled bulk superconductors, which represent the first superconducting high-entropy nonoxide ceramics. In particular, these HESs have higher values (3.2–3.3 K) compared with those of the binary counterparts and their ratios are the largest among superconductors of the same structural type.
- Received 20 November 2022
- Revised 29 December 2022
- Accepted 10 January 2023
DOI:https://doi.org/10.1103/PhysRevMaterials.7.014805
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