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Structure and Superconductivity of Tin-Containing HfTiZrSnM (M = Cu, Fe, Nb, Ni) Medium-Entropy and High-Entropy Alloys
| Content Provider | MDPI |
|---|---|
| Author | Darja, Gačnik Primo, ž Koželj Erik, Zupanič Janez, Dolinšek Jelen, Andreja Krnel, Mitja Vrtnik, Stanislav Luzar, Jože van Midden, Marion Wencka, Magdalena Meden, Anton Hu, Qiang Guo, Sheng |
| Copyright Year | 2021 |
| Description | In an attempt to incorporate tin (Sn) into high-entropy alloys composed of refractory metals Hf, Nb, Ti and Zr with the addition of 3d transition metals Cu, Fe, and Ni, we synthesized a series of alloys in the system HfTiZrSnM (M = Cu, Fe, Nb, Ni). The alloys were characterized crystallographically, microstructurally, and compositionally, and their physical properties were determined, with the emphasis on superconductivity. All Sn-containing alloys are multi-phase mixtures of intermetallic compounds (in most cases four). A common feature of the alloys is a microstructure of large crystalline grains of a hexagonal (Hf, Ti, $Zr)_{5}Sn_{3}$ partially ordered phase embedded in a matrix that also contains many small inclusions. In the HfTiZrSnCu alloy, some Cu is also incorporated into the grains. Based on the electrical resistivity, specific heat, and magnetization measurements, a superconducting (SC) state was observed in the HfTiZr, HfTiZrSn, HfTiZrSnNi, and HfTiZrSnNb alloys. The HfTiZrSnFe alloy shows a partial SC transition, whereas the HfTiZrSnCu alloy is non-superconducting. All SC alloys are type II superconductors and belong to the Anderson class of “dirty” superconductors. |
| Starting Page | 3953 |
| e-ISSN | 19961944 |
| DOI | 10.3390/ma14143953 |
| Journal | Materials |
| Issue Number | 14 |
| Volume Number | 14 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2021-07-15 |
| Access Restriction | Open |
| Subject Keyword | Materials High-entropy Alloys Structure and Microstructure Superconductivity |
| Content Type | Text |
| Resource Type | Article |
