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Crystal Field and Exchange Interactions in DyT4Al8 (T = Fe and Mn)

Published online by Cambridge University Press:  22 February 2011

M. Loewenhaupt ,
C.-K. Loong ,
P. Tils  and
W. Hahn
M. Loewenhaupt
Affiliation:
Institut fur Festkörperforschung, D-52425 Jülich, Germany;
C.-K. Loong
Affiliation:
Argonne National Laboratory, Argonne, IL 60439
P. Tils
Affiliation:
Institut fur Festkörperforschung, D-52425 Jülich, Germany;
W. Hahn
Affiliation:
Institut fur Festkörperforschung, D-52425 Jülich, Germany;
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Abstract

We investigated the magnetic excitations in polycrystalline samples of hard magnet related compounds DyFe4Al8 and DyMn4Al8 by neutron spectroscopy. For both compounds the magnetic spectra at energies below 40 meV are dominated by the response of the Dy3+ ions. In DyMn4Al8 we observed pure crystal-field transitions within the Dy3+ J=15/2 ground multiplet which is split into 8 doublets under the low point-group symmetry of 4/mmm. In DyFe4Al8 the Dy crystal-field-split states are perturbed by the molecular fields of the ordered Fe sublattice.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 376: Symposium BB – Neutron Scattering in Materials Science , 1994 , 725
Copyright
Copyright © Materials Research Society 1995

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References

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