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• W2896789433 abstract "$^{75}mathrm{As}$ nuclear magnetic resonance (NMR) and nuclear quadrupole resonance (NQR) measurements have been carried out to investigate the magnetic and electronic properties of the filled skutterudite metallic compound ${mathrm{SrFe}}_{4}{mathrm{As}}_{12}$. The temperature dependence of Knight shift $K$ determined by the NQR spectrum under a small magnetic field $(ensuremath{le}0.5phantom{rule{0.16em}{0ex}}mathrm{T})$ shows the similar temperature dependence of the magnetic susceptibility $ensuremath{chi}$ which exhibits a broad maximum at ${T}^{*}ensuremath{sim}50$ K. The nuclear spin-lattice relaxation rate divided by temperature $1/{T}_{1}T$ increases with decreasing temperature and exhibits a broad maximum at $Tensuremath{sim}70$ K, similar to the case of $ensuremath{chi}$. The temperature dependence of $K$ and $1/{T}_{1}T$ is reasonably explained by a simple model where we assume a concave-shaped band structure near the Fermi energy. Based on a Korringa ratio analysis using the ${T}_{1}$ and $K$ data, ferromagnetic spin fluctuations are found to exist in ${mathrm{SrFe}}_{4}{mathrm{As}}_{12}$. These results indicate that ${mathrm{SrFe}}_{4}{mathrm{As}}_{12}$ can be characterized to be a metal with ferromagnetic correlations and also the peculiar band structure responsible for the suppression of $1/{T}_{1}T$ and $K$ at low temperatures." @default.
• W2896789433 created "2018-10-26" @default.
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• W2896789433 date "2018-10-31" @default.
• W2896789433 modified "2023-10-14" @default.
• W2896789433 title "Ferromagnetic spin fluctuations in the filled skutterudite SrFe4As12 revealed by As75 NMR-NQR measurements" @default.
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• W2896789433 doi "https://doi.org/10.1103/physrevb.98.155149" @default.
• W2896789433 hasPublicationYear "2018" @default.
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