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- W137110087 abstract "We report on inelastic-neutron-scattering studies of the paramagnetic response in polycrystalline samples of the heavy-electron compound ${mathrm{USn}}_{3}$. The magnetic scattering function, S(Q,E), was determined over a wide range of momentum and energy transfer, 0.5Q6 AA{} $^{mathrm{ensuremath{-}}1}$ and 0E200 meV, at temperatures ranging from 1.5 to 300 K. We find that S(Q,E) at E>2 meV consists of only a broad quasielastic component characteristic relaxational dynamics of the U spins. The temperature dependence of the line width of this quasielastic peak exhibits a ${mathit{T}}^{1/2}$-type power law with a large residual width at the lowest temperature. At E2 meV, on the other hand, there is evidence of an additional narrow component with a full width at half maximum of the order of 1 meV. Within experimental precision, we find no evidence of other inelastic peaks due to crystal-field excitations. The single-site magnetic susceptibility, ensuremath{chi}(Q,T), obtained by a Kramers-Kronig analysis of the quasielastic spectra, is smaller than the bulk static susceptibility at low temperatures. At a given temperature, ensuremath{chi}(Q) exhibits a Q dependence indicative of an instability towards antiferromagnetic ordering. The experimental results are compared with the spin dynamics observed in other heavy-f-electron compounds and the implication of s-f electronic hybridization is discussed." @default.
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- W137110087 date "1990-05-01" @default.
- W137110087 modified "2023-10-17" @default.
- W137110087 title "Magnetic excitations inUSn3" @default.
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- W137110087 doi "https://doi.org/10.1103/physrevb.41.9294" @default.
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