J. Phys. Colloques
Volume 49, Numéro C8, Décembre 1988Proceedings of the International Conference on Magnetism
|Page(s)||C8-185 - C8-186|
J. Phys. Colloques 49 (1988) C8-185-C8-186
MAGNETIC STRUCTURE AND EXCITATIONS IN THE INTERMETALLIC COMPOUND MnNiK. Mikke1, V. A. Udovenko2, J. J. Milczarek1, E. Z. Vintaikin2, S. Y. Makushev2 et V. B. Dmitriev2
1 Institute of Atomic Energy, Swierk, 05-400 Otwock, Poland
2 Bardin Institute of Iron and Steel, Moscow, U.S.S.R.
Neutron diffraction studies were made of the magnetic structure and spin wave excitations in a single-domain crystal of intermetallic compound MnNi. It was shown that the magnetic moments of manganese atoms are arranged in (001) planes and are oriented along  direction. Spin wave velocities are not significantly different from those in a number of γ-Mn alloys in spite of very high Néel temperature of MnNi and the energy gap, if any, is not bigger than 3 meV.