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- W3092118082 abstract "CeIrSn with a quasikagome Ce lattice in the hexagonal basal plane is a strongly valence fluctuating compound, as we confirm by hard x-ray photoelectron spectroscopy and inelastic neutron scattering, with a high Kondo temperature of $T_{mathrm{K}}sim 480$,K. We report a negative in-plane thermal expansion $alpha/T$ below 2,K, which passes through a broad minimum near 0.75,K. Volume and $a$-axis magnetostriction for $B parallel a$ are markedly negative at low fields and change sign before a sharp metamagnetic anomaly at 6,T. These behaviors are unexpected for Ce-based intermediate valence systems, which should feature positive expansivity. Rather they point towards antiferromagnetic correlations at very low temperatures. This is supported by muon spin relaxation measurements down to 0.1,K, which provide microscopic evidence for a broad distribution of internal magnetic fields. Comparison with isostructural CeRhSn suggests that these antiferromagnetic correlations emerging at $Tll T_{mathrm{K}}$ result from geometrical frustration." @default.
- W3092118082 created "2020-10-15" @default.
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- W3092118082 date "2021-05-27" @default.
- W3092118082 modified "2023-10-17" @default.
- W3092118082 title "Antiferromagnetic Correlations in Strongly Valence Fluctuating CeIrSn" @default.
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- W3092118082 doi "https://doi.org/10.1103/physrevlett.126.217202" @default.
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