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Magnetic excitations and quasielastic linewidths in YbBe13 from neutron scattering
Abstract
Inelastic magnetic neutron spectra were taken on polycrystalline YbBe13 between 1.2 and 300 K. At low temperatures the formation of a magnon corroborates the existence of a magnetic phase transition observed also by static susceptibility. At higher temperatures two distinct CF-transition lines are observed, which lead to the cubic CF-parameters x = 0.911 and W = 0.1543 meV. The magnetic quasielastic linewidth increases linearly with temperature and is anomalous large compared to TbBe13 but small everywhere compared to kBT. © 1985.
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