Crystalline electric field schemes of Ce₂NiGe₆ and Ce₂NiGe₃

The splitting levels and corresponding wave functions of rare earth compounds Ce₂NiGe₆ and Ce₂NiGe₃ have been presented by taking into account the crystalline electric field. The influences of Ge content on rare earth ion ground state splitting also have been analysed. The first excited energy and overall splitting energy of Ce₂NiGe₃ coincides with the ones calculated by simulating Schottky specific heat. (paper)