Neutron spectroscopy studies of the crystal-field interaction in RET<sub>4</sub>Al<sub>8</sub> compounds (RE=Tb, Ho or Er; T=Mn, Fe or Cu)
R Caciuffo; G Amoretti; K H J Buschow; O Moze; A P Murani; B Paci; R Caciuffo; Dipartimento di Sci. dei Mater. e della Terra, Ancona Univ., Italy; G Amoretti; Dipartimento di Sci. dei Mater. e della Terra, Ancona Univ., Italy; K H J Buschow; Dipartimento di Sci. dei Mater. e della Terra, Ancona Univ., Italy; O Moze; Dipartimento di Sci. dei Mater. e della Terra, Ancona Univ., Italy; A P Murani; Dipartimento di Sci. dei Mater. e della Terra, Ancona Univ., Italy; B Paci; Dipartimento di Sci. dei Mater. e della Terra, Ancona Univ., Italy
Журнал:
Journal of Physics: Condensed Matter
Дата:
1995-10-09
Аннотация:
Inelastic neutron scattering experiments have been performed on some members of the tetragonal RET<sub>4</sub>Al<sub>8</sub> series of compounds (RE=Tb, Ho or Er; T=Mn, Fe or Cu) in order to determine the crystal-field potential at the RE site. A consistent set of the crystal-field parameters has been obtained from the experimental data by a least-squares fit procedure, using information on the second-order term deduced from Mossbauer spectroscopy measurements in <sup>155</sup>GdT<sub>4</sub>Al<sub>8</sub>. The results obtained have been used to estimate the rare-earth contribution to the magnetic anisotropy constants and to discuss the characteristics of possible spin reorientation processes.
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