We have studied the crystalline-electric-field excitation spectrum in PrMg3 with non-Kramers doublet Γ3 ground state by inelastic neutron scattering experiments on powder and single crystal samples. Experimental results have revealed the development of a dispersive structure in the Γ3-Γ4 and the Γ3- Γ5 excitations below 50 K. Moreover, the excitation spectra of the Γ3-Γ4 transition were found out to consist of two peaks, resulting in the two branches in dispersion relation. While one branch shows a relatively strong q-dependence, the other branch is almost dispersionless. The dispersion of the former branch is considered to result from the magnetic dipole exchange interaction, but the origin of the excitation of the latter branch is not clear at present.
ASJC Scopus subject areas
- Physics and Astronomy(all)