Equiatomic ternary compounds, TbPdIn and DyPdIn, have been studied by means of DC magnetization, AC susceptibility, magnetic relaxation, specific heat and electrical resistivity measurements. The two compounds are ferromagnets below a transition temperature TC = 74 K for TbPdIn and TC = 38 K for DyPdIn with metastable magnetic properties, behaving as the irreversibility of the temperature dependence of magnetization below a characteristic temperature Tir and the long-time magnetic relaxation behavior below TC when changing the magnetic field at a constant temperature. DyPdIn shows the second phase transition at TN = 23 K, caused by the antiferromagnetic coupling. For both compounds, the ground state is not a collinear ferromagnet, but some canted one with antiferromagnetic component. The observed metastable magnetic properties are discussed in terms of domain-wall pinning model. The complex magnetic structures in DyPdIn and TbPdIn are compared with those of isostructural DyNiAl and HoNiAl.
- Magnetic relaxation
- Metastable state