Abstract

Magnetic properties of Pm ions in NdNiAl4 were investigated by low-temperature nuclear orientation of 144Pm. The observed γ-ray anisotropy as a function of external fields revealed a change in the magnetic structure of Pm ions at the metamagnetic phase transition of NdNiAl4. The extracted hyperfine field was 50(5) T which is substantially smaller than those previously reported.

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