Perturbed angular correlation spectra of in the antiferromagnetic phase of the rare earth-gallium intermetallics RGa2, R = Ce to Er at 4 K. For comparison, typical spectra of the paramagnetic phase at 300 K are shown in the top-most section.
PAC spectra of in PrGa2 and the extracted magnetic hyperfine frequency (right-hand section) as a function of temperature.
The spin dependence of the magnetic hyperfine field of in RGa2. NdGa2 and HoGa2 (marked by asterisks) strongly deviate from the systematic variation shown by the other RGa2.
The hyperfine frequencies and of in the rare earth-gallium intermetallics RGa2 at 4 K, derived from the PAC spectra of Fig. 1 . In the case of SmGa2, the measurement was carried out at 8 K. 15 β is the angle between the symmetry axis of the EFG tensor and the direction of the magnetic hyperfine field B hf . The precision of β is of the order of 10°. T N is the magnetic order temperature obtained from the temperature dependence of B hf (precision ∼ 1 K). is the projection of the 4f-spin on the total angular momentum is the de Gennes factor.
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