| Numéro |
J. Phys. Colloques
Volume 49, Numéro C8, Décembre 1988
Proceedings of the International Conference on Magnetism
|
|
|---|---|---|
| Page(s) | C8-1139 - C8-1140 | |
| DOI | https://doi.org/10.1051/jphyscol:19888522 | |
Proceedings of the International Conference on Magnetism
J. Phys. Colloques 49 (1988) C8-1139-C8-1140
DOI: 10.1051/jphyscol:19888522
Department of Physics, University of Manitoba, Winnipeg, Manitoba, Canada R3T 2N2
J. Phys. Colloques 49 (1988) C8-1139-C8-1140
DOI: 10.1051/jphyscol:19888522
MAGNETIZATION OF VERY DILUTE PdMn AND PdFe ALLOYS : RE-ENTRANT BEHAVIOUR ?
K. Kornik, H. Kunkel et R. M. RoshkoDepartment of Physics, University of Manitoba, Winnipeg, Manitoba, Canada R3T 2N2
Abstract
The static magnetization of three very dilute Pd-based alloys containing 700 ppm Fe, 700 ppm Mn and 1 000 ppm Mn has been measured in low applied fields up to 10 Oe as a function of temperature between 50 mK and 1.0 K. The zero field cooled magnetization possesses features which can be replicated by a mean field effective-field model for bond disordered systems with arbitrary spin S, suggesting that these alloys may be in the re-entrant regime of the magnetic phase diagram. Measurements of the time dependence of the thermoremanent magnetization yield essentially logarithmic behaviour over a wide range of temperatures.