Temperature evolution of the high-harmonic magnetic modulations in DyFeO 3

We report on the temperature evolution of magnetic satellites associated with the incommensurate magnetic ordering of Dy 3+ ions in DyFeO 3 below 4.1 K. Using high-resolution neutron diffraction, incommensurate magnetic reflections, satellites of the 001 reflection with odd harmonics up to the seventh order, were observed and their temperature dependence quantified. Key parameters, such as the modulation length, FWHM and integrated intensities, were analysed across the measured temperature range. The results were compared with a previous study of the soliton lattice in TbFeO 3 which appears under an applied magnetic field. Possible microscopic models underlying the magnetic order of Dy 3+ are discussed in this context.