Magnetic properties of RNi/sub 4/B (R=rare earth metal)

We present AC-, DC-susceptibility and magnetization measurements of the RNi/sub 4/B series from which we determine the paramagnetic properties of RNi/sub 4/B (R=Y, La, Ce). The ferromagnetic order of RNi/sub 4/B (R=magnetic rare earth) is similar to those of the RNi/sub 5/ series with the exception of SmNi/sub 4/B and TbNi/sub 4/B where for the former the highest ordering temperature in this series (39 K) together with a spin reorientation at 31.7 K occurs.<
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