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| Main Authors: | , , , , , , , , |
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| Format: | Preprint |
| Published: |
2025
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2504.18924 |
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| _version_ | 1866908529334419456 |
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| author | Ding, Qing-Ping Taylor, Charles Lee, Yongbin Dissanayake, Charuni Mishra, Vireshwar Le, Dang Khoa Phan, Manh-Huong Nakajima, Yasuyuki Furukawa, Yuji |
| author_facet | Ding, Qing-Ping Taylor, Charles Lee, Yongbin Dissanayake, Charuni Mishra, Vireshwar Le, Dang Khoa Phan, Manh-Huong Nakajima, Yasuyuki Furukawa, Yuji |
| contents | Static and dynamical magnetic and electronic properties of the kagome metal Sc$_3$Mn$_3$Al$_7$Si$_5$ have been investigated by $^{27}$Al nuclear magnetic resonance (NMR) measurements. The temperature dependence of Knight shift ($K$) shows a similar temperature dependence of the DC magnetic susceptibility $χ$ except for the low-temperature region below $\sim$ 50 K where $K$ is almost constant while $χ$ keeps increasing, which suggests that the increase in $χ$ at low temperatures is not intrinsic. $^{27}$Al spin-lattice relaxation rate divided by temperature ($1/T_1T$) is found to be constant, confirming the metallic state of Sc$_3$Mn$_3$Al$_7$Si$_5$ from a microscopic point of view. Based on a Korringa ratio analysis using the $T_1$ and $K$ data, ferromagnetic spin fluctuations are found to dominate in Sc$_3$Mn$_3$Al$_7$Si$_5$. These fluctuations are suggested to be very slow with frequencies on the order of kilohertz or lower. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2504_18924 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Slow ferromagnetic fluctuations in the kagome metal Sc$_3$Mn$_3$Al$_7$Si$_5$ revealed by $^{27}$Al NMR Ding, Qing-Ping Taylor, Charles Lee, Yongbin Dissanayake, Charuni Mishra, Vireshwar Le, Dang Khoa Phan, Manh-Huong Nakajima, Yasuyuki Furukawa, Yuji Strongly Correlated Electrons Static and dynamical magnetic and electronic properties of the kagome metal Sc$_3$Mn$_3$Al$_7$Si$_5$ have been investigated by $^{27}$Al nuclear magnetic resonance (NMR) measurements. The temperature dependence of Knight shift ($K$) shows a similar temperature dependence of the DC magnetic susceptibility $χ$ except for the low-temperature region below $\sim$ 50 K where $K$ is almost constant while $χ$ keeps increasing, which suggests that the increase in $χ$ at low temperatures is not intrinsic. $^{27}$Al spin-lattice relaxation rate divided by temperature ($1/T_1T$) is found to be constant, confirming the metallic state of Sc$_3$Mn$_3$Al$_7$Si$_5$ from a microscopic point of view. Based on a Korringa ratio analysis using the $T_1$ and $K$ data, ferromagnetic spin fluctuations are found to dominate in Sc$_3$Mn$_3$Al$_7$Si$_5$. These fluctuations are suggested to be very slow with frequencies on the order of kilohertz or lower. |
| title | Slow ferromagnetic fluctuations in the kagome metal Sc$_3$Mn$_3$Al$_7$Si$_5$ revealed by $^{27}$Al NMR |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2504.18924 |