Numéro
J. Phys. Colloques
Volume 43, Numéro C4, Décembre 1982
ICOMAT-82
International Conference on Martensitic Transformations
Page(s) C4-335 - C4-340
DOI https://doi.org/10.1051/jphyscol:1982447
ICOMAT-82
International Conference on Martensitic Transformations

J. Phys. Colloques 43 (1982) C4-335-C4-340

DOI: 10.1051/jphyscol:1982447

MARTENSITIC TRANSFORMATION AND ELASTIC PROPERTY OF THE ANTIFERROMAGNETIC AuMn-AuZn QUASIBINARY ALLOYS

Y. Murakami1, N. Nakanishi2, H. Morimoto2, M. Takano2 et S. Kachi1

1  Department of Chemistry, Kyoto University, Kyoto 606, Japan
2  Departement of Chemistry, Konan University, Kobe 658, Japan


Abstract
The antiferromagnetic AuMn-AuZn quasibinary alloys undergo a martensitic transformation from the CsCl-type cubic (B2) to the tetragonal (tetragonally distorted B2) with the axial ratio c/a<1. This transformation was thermoelastic and of the 1st order, although it was close to the 2nd order transformation. The shape memory effect was also observed. The transformation temperature from cubic to tetragonal, Tt, was about 10 degrees lower than the Neel temperature of antiferromagnetism, TN, in this alloy system. The temperature dependence of the elastic constants was measured and the results were compared with those of Mn-Ni and Au-Zn alloys.