Crystal field excitations for Ho3+ in HoFeO3

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Australian Institute of Physics
The orthoferrites, RFeO3 (R = rare earth), are promising candidates for innovative spintronic applications. HoFeO3 is of particular interest because optical measurements indicate that the magnetic splitting of the Ho3+ ion’s crystal field (CF) ground state lies in the range of antiferromagnetic–resonance frequencies for the Fe subsystem [1]. Inelastic neutron scattering data recorded on the Australian Neutron Beam Centre’s PELICAN time-of-flight spectrometer are consistent with Ho3+ CF levels at about 10.5, 15.4 and 22.0 meV. Additional low energy transitions (< 1 meV) exhibit behaviour that groups into three distinct temperature ranges (Fig. 1). Given that the Fe sub-lattice undergoes magnetic reorientation over the temperature range of 35 K to 60 K, it is believed that these excitations are associated with magnetic splitting of the Ho3+ ground CF level due to an exchange field originating from the Fe sub-lattice.
Crystal field, Excitation, Holmium, Iron, Rare earths, Australia, Beams, ANSTO, Time-of-flight spectrometers, Temperature range
Stewart. G. A., Iles, G. N., Mole, R. A., Yamani, Z., & Ryan, D. H. (2017). Crystal field excitations for Ho3+ in HoFeO3. Poster presented to the 41st Annual Condensed Matter and Materials Meeting, 31st January - 3rd February 2017 Charles Sturt University Wagga Wagga, NSW, Australia, (pp. 47). Retrieved from: