Magnetocrystalline anisotropy and phase transformation in Co-Pt alloy

A magnetic characterization of the CO
1-x
Pt
x
system with
0\leqx\leq0.8
has been made. The anisotropy field (H
A
) of both the hard magnetic phases, i.e. hexagonal at low Pt content and tetragonal around the equiatomic composition, has been measured by the singular point detection technique (SPD). The dependence of H
A
on composition and temperature is given. The solid state transformation diagram at low Pt content has been completed by using the thermomagnetic analysis (TMA).