Abstract
In order to investigate excitations in TbOx and TbAl2, the nuclear resonant absorption of the 58 keV Mössbauer line supplied by159Dy sources was studied.
Localized states observed in both compounds are partly attributed to excitations of the terbium ion within theJ=6 state multiplet. In the case of TbOx, this is confirmed by an investigation of the Schottky anomalies in the specific heat. In TbAl2, the observed excitation states agree with values calculated by using parameters from magnetization data. Other localized states appearing in TbOx are assigned to vibrations of the terbium ion. The cut off frequencies of the terbium oscillations are determined to be 18 meV (TbOx) and 15 meV (TbAl2) in agreement with conclusions from Debye Waller factors also investigated in the present experiments.
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Endres, G., Strohkendl, F., Langhoff, H. et al. Observation of localized modes in TbOx and TbAl2 by resonance absorption of γ-quanta. Z. Physik B - Condensed Matter 44, 253–257 (1981). https://doi.org/10.1007/BF01294160
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DOI: https://doi.org/10.1007/BF01294160