2025/04/26 by Ding, Qing-Ping, Taylor, Charles, Lee, Yongbin +6
#FOS: Physical sciences #Strongly Correlated Electrons (cond-mat.str-el)
paper · doi:10.48550/arxiv.2504.18924
Static and dynamical magnetic and electronic properties of the kagome metal Sc3Mn3Al7Si5 have been investigated by 27Al 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 ∼ 50 K where K is almost constant while χ keeps increasing, which suggests that the increase in χ at low temperatures is not intrinsic. 27Al spin-lattice relaxation rate divided by temperature (1/T1T) is found to be constant, confirming the metallic state of Sc3Mn3Al7Si5 from a microscopic point of view. Based on a Korringa ratio analysis using the T1 and K data, ferromagnetic spin fluctuations are found to dominate in Sc3Mn3Al7Si5. These fluctuations are suggested to be very slow with frequencies on the order of kilohertz or lower.