J. Phys. Colloques
Volume 49, Numéro C8, Décembre 1988Proceedings of the International Conference on Magnetism
|Page(s)||C8-373 - C8-374|
J. Phys. Colloques 49 (1988) C8-373-C8-374
ANTIFERROMAGNETIC STRUCTURE AND CRYSTAL FIELD SPLITTINGS IN THE CUBIC HEUSLER ALLOYS HoPd2Sn AND ErPd2SnW.-H. Li1, 2, J. W. Lynn1, 2, H. B. Stanley1, 2, T. J. Udovic2, R. N. Shelton3 et P. Klavins3
1 Center for Superconductivity Research, Department of Physics, University of Maryland, College Park, MD 20742, U.S.A.
2 National Bureau of Standards, Gaithersburg, MD 20899, U.S.A.
3 Department of Physics, University of California, Davis, CA 95616, U.S.A.
Neutron scattering techniques have been employed to investigate the magnetic properties of the cubic Heusler alloys HoPd2Sn and ErPd2Sn. Both materials exhibit an fcc type-II antiferromagnetic order, with TN = 5.0 and 1.0 K for Ho and Er materials, respectively. However, there is an additional modulation of this basic structure. Inelastic neutron scattering measurements have been performed by time-of-flight techniques to determine the crystal field levels of the rare-earth ions. The (cubic) Lea, Leask, and Wolf crystal field parameters were determined to be W = 0.0287(4) meV, x = 0.3248(8) for HoPd2Sn, and W = - 0.0450(4) meV, x = 0.3022(6) for ErPd2Sn.