| Numéro |
J. Phys. Colloques
Volume 49, Numéro C8, Décembre 1988
Proceedings of the International Conference on Magnetism
|
|
|---|---|---|
| Page(s) | C8-345 - C8-346 | |
| DOI | https://doi.org/10.1051/jphyscol:19888154 | |
Proceedings of the International Conference on Magnetism
J. Phys. Colloques 49 (1988) C8-345-C8-346
DOI: 10.1051/jphyscol:19888154
1 Naval Surface Warfare Center, Silver Spring, Maryland 20903, U.S.A.
2 National Bureau of Standards, Gaithersburg, Maryland 20899, U.S.A.
J. Phys. Colloques 49 (1988) C8-345-C8-346
DOI: 10.1051/jphyscol:19888154
NEUTRON SCATTERING STUDY OF MAGNETIC ORDER IN A Tb0.5Dy0.5 SINGLE CRYSTAL
M. L. Spano1, 2, J. A. Gotaas2 et J. J. Rhyne21 Naval Surface Warfare Center, Silver Spring, Maryland 20903, U.S.A.
2 National Bureau of Standards, Gaithersburg, Maryland 20899, U.S.A.
Abstract
Neutron diffraction measurements have been made on Tb0.5Dy0.5 and show initial ordering into a spiral antiferromagnetic phase (with decreasing temperature) and then into a ferromagnetic phase. The inter-layer turn angle changed from 35° to 23° as the temperature moved from the Néel to the Curie temperature. In addition, a magnetostriction-related expansion of the c-axis of about 0.4 % was observed over the same temperature range. The periodic moment state persisted somewhat into the nominal ferromagnetic regime and was accompanied by a slight increase in the turn angle (~ 2°).