Long-time variation of magnetic structure in rare-earth intermetallic compounds

Long-time variations of magnetic structure have been studied by means of time-resolved neutron scattering measurements in two kinds of non-diluted uniform magnets, PrCo2Si2 and TbNi2Si2. These materials show commensurate (C) to incommensurate (IC) magnetic transitions below Neel temperature. When a sample is cooled to the low temperature C-phase, magnetic Bragg scattering signals from the C and the IC phases coexist and then their intensity vary with time. These characteristics are similar to those of the previously studied material CeIr3Si2. However, the temperature ranges in which clear time variations exist are much narrower in the present materials.