Magnetocrystalline Anisotropy in Ordered Sendust Alloys Single Crystal

Dependence of the magnetocrystalline anisotropy constant K
1
on composition and temperature was studied. A difference of an entire order of magnitude in the maximum K
1
value for the slightly different compositions 8.5 wt% Si, 5.0 wt% Al, bal. Fe sample and the 7.5 wt% Si, 6.8 wt% Al, bal. Fe was found, and the difference between their T
K1=0
(temperature at which K
1
is zero) was a high 300°C. Other results showed that the effect of thermal processing varies dramatically with only slight change in composition.