Possible Proximity to Ferromagnetism in the V$_2$Ga$_5$ Superconductor
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arXiv
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| Autori principali: | , , , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2026
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| _version_ | 1866914321407148032 |
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| author | Królak, Szymon Huai, Xudong Jarosz, Wiktoria Košuth, Filip Szabó, Pavol Winiarski, Michał J. Malick, Sudip Tran, Thao T. Klimczuk, Tomasz |
| author_facet | Królak, Szymon Huai, Xudong Jarosz, Wiktoria Košuth, Filip Szabó, Pavol Winiarski, Michał J. Malick, Sudip Tran, Thao T. Klimczuk, Tomasz |
| contents | Superconductivity and ferromagnetism are generally competing ground states in $d$-electron systems, making their interplay of fundamental interest. We report a comprehensive study of high-quality single- and polycrystalline V$_2$Ga$_5$, a bulk type-II superconductor ($T_c = 3.54 \ K$) with a quasi-one-dimensional crystal structure, supplemented with density functional theory (DFT) calculations, suggesting possible proximity to ferromagnetic order. Below $T \approx 10 \ K$, magnetic susceptibility shows ZFC/FC splitting, along with saturation and hysteresis in $M(H)$. Moreover, electrical transport measurements reveal a magnetic-field-dependent resistivity upturn, while specific heat is enhanced in magnetic fields. DFT calculations show that the Fermi level in V$_2$Ga$_5$ is located at a peak in the density of states, with a small magnetic moment per unit cell comparable to the experimental value. Together, these results indicate the possibility that ferromagnetic correlations develop below $T \approx 10 \ K$, well above $T_c$, with long-range ferromagnetic order suppressed by the superconducting transition. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2602_10313 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Possible Proximity to Ferromagnetism in the V$_2$Ga$_5$ Superconductor Królak, Szymon Huai, Xudong Jarosz, Wiktoria Košuth, Filip Szabó, Pavol Winiarski, Michał J. Malick, Sudip Tran, Thao T. Klimczuk, Tomasz Superconductivity Superconductivity and ferromagnetism are generally competing ground states in $d$-electron systems, making their interplay of fundamental interest. We report a comprehensive study of high-quality single- and polycrystalline V$_2$Ga$_5$, a bulk type-II superconductor ($T_c = 3.54 \ K$) with a quasi-one-dimensional crystal structure, supplemented with density functional theory (DFT) calculations, suggesting possible proximity to ferromagnetic order. Below $T \approx 10 \ K$, magnetic susceptibility shows ZFC/FC splitting, along with saturation and hysteresis in $M(H)$. Moreover, electrical transport measurements reveal a magnetic-field-dependent resistivity upturn, while specific heat is enhanced in magnetic fields. DFT calculations show that the Fermi level in V$_2$Ga$_5$ is located at a peak in the density of states, with a small magnetic moment per unit cell comparable to the experimental value. Together, these results indicate the possibility that ferromagnetic correlations develop below $T \approx 10 \ K$, well above $T_c$, with long-range ferromagnetic order suppressed by the superconducting transition. |
| title | Possible Proximity to Ferromagnetism in the V$_2$Ga$_5$ Superconductor |
| topic | Superconductivity |
| url | https://arxiv.org/abs/2602.10313 |