Abstract
We present measurements of the ac susceptibility, magnetization, resistivity and specific heat of the intermetallic Laves phase compound TmNi 2. The specific heat of LuNi 2 is measured separately from 1.7 to 100 K, enabling an analysis of the magnetic specific heat of TmNi 2 over the temperature range 45 mK – 100 K. This material shows a ferromagnetic transition temperature of 1.1 K and a crystal field singlet ground state. Several sets of Hamiltonian parameters are discussed, taking into account the recently reported distortion from cubic symmetry in TmNi 2.
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