UC Irvine

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.