Superconducting properties and electronic structure of CuAl2-type transition-metal zirconide Fe1-xNixZr2
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| Main Authors: | , , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2024
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| _version_ | 1866909395982483456 |
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| author | Shimada, Ryunosuke Watanabe, Yuto Tortora, Lorenzo Tomassucci, Giovanni Hacisalihoǧlu, Muammer Yasin Arima, Hiroto Yamashita, Aichi Miura, Akira Moriyoshi, Chikako Saini, Naurang L. Mizuguchi, Yoshikazu |
| author_facet | Shimada, Ryunosuke Watanabe, Yuto Tortora, Lorenzo Tomassucci, Giovanni Hacisalihoǧlu, Muammer Yasin Arima, Hiroto Yamashita, Aichi Miura, Akira Moriyoshi, Chikako Saini, Naurang L. Mizuguchi, Yoshikazu |
| contents | CuAl2-type transition-metal (Tr) zirconides are superconductor family, and the Tr-site element substitution largely modifies its transition temperature (Tc). Here, we synthesized polycrystalline samples of Fe1-xNixZr2 by arc melting. From magnetic susceptibility measurements, bulk superconductivity was observed for 0.4 < x < 0.8, and the highest Tc of 2.8 K was observed for x = 0.6. Specific heat measurements were also performed, bulk superconductivity was observed for 0.4 < x < 0.8, and the highest Tc of 2.6 K was observed for x = 0.6. The obtained superconductivity phase diagram exhibits dome-shaped trend, which is similar to unconventional superconductors, where magnetic fluctuations are essential for superconductivity. In addition, from the c/a lattice constant ratio analysis, we show the possible relationship between the suppression of bulk superconductivity in the Ni-rich compositions and a collapsed tetragonal transition. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2405_04184 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Superconducting properties and electronic structure of CuAl2-type transition-metal zirconide Fe1-xNixZr2 Shimada, Ryunosuke Watanabe, Yuto Tortora, Lorenzo Tomassucci, Giovanni Hacisalihoǧlu, Muammer Yasin Arima, Hiroto Yamashita, Aichi Miura, Akira Moriyoshi, Chikako Saini, Naurang L. Mizuguchi, Yoshikazu Superconductivity Strongly Correlated Electrons CuAl2-type transition-metal (Tr) zirconides are superconductor family, and the Tr-site element substitution largely modifies its transition temperature (Tc). Here, we synthesized polycrystalline samples of Fe1-xNixZr2 by arc melting. From magnetic susceptibility measurements, bulk superconductivity was observed for 0.4 < x < 0.8, and the highest Tc of 2.8 K was observed for x = 0.6. Specific heat measurements were also performed, bulk superconductivity was observed for 0.4 < x < 0.8, and the highest Tc of 2.6 K was observed for x = 0.6. The obtained superconductivity phase diagram exhibits dome-shaped trend, which is similar to unconventional superconductors, where magnetic fluctuations are essential for superconductivity. In addition, from the c/a lattice constant ratio analysis, we show the possible relationship between the suppression of bulk superconductivity in the Ni-rich compositions and a collapsed tetragonal transition. |
| title | Superconducting properties and electronic structure of CuAl2-type transition-metal zirconide Fe1-xNixZr2 |
| topic | Superconductivity Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2405.04184 |