Consequence of spatial symmetry on ³¹P NMR spectra in PrFe ₄P₁₂ with scalar order

NMR (nuclear magnetic resonance) splitting pattern of ³¹P is discussed for PrFe₄P₁₂ assuming scalar order with Γ1g symmetry. We extend our previous study of NMR spectra into the non-linear range of the external magnetic field, and discuss magnetic anisotropy. A background is provided of the phenomenological formula for the NMR splitting pattern. It is shown that the field dependence of the NMR splitting can be reproduced for the field directions (001), (111) and (110) with account of the measured Pr magnetization. The hyperfine constants for the dipolar field coming from the Pr dipole moment are calculated within classical approximation, and the transferred hyperfine constants are deduced from the fitting of the NMR splitting pattern.