Spin-glass transition as the cause of a false heavy-fermion behavior of the YbHx system
Kotel'nikova E. E. , Suleimanov N. M., Khaliullin G. G. , Drulis H. , Iwasieczko W.
Ytterbium ions in the cubic phase of YbHx have a well-defined magnetic moment according to ESR measurements. A transition to a spin-glass state has been observed at Τ ~ 8 K. The low-temperature anomalies which have been seen previously in the specific heat and magnetic susceptibility, and which suggested that this is a heavy-fermion system, are very probably due to a magnetic transition.