Magnetic properties of (Fe, Co and Ni) - Zr amorphous alloys

Magnetic properties of melt-quenched amorphous ribbons having the general composition TM
100-x
Zr
x
(TM= Fe,Co and/or Ni) have been investigated. Composition dependence of Curie temperature, Tc and magnetic moment, n
B
in Co
100-x
Zr
x
and Ni
100-x
Zr
x
alloys is similar to Co- and Ni-metalloid amorphous alloys. However, the decrement of Zr content in the Fe
100-x
Zr
x
alloys causes both Tc and n
B
to decrease, and n
B
extrapolates at x=0 to almost 0 μ
B
. Such an unusual behavior of Tc and n
B
is also found on the Fe-rich portion of (Fe-Co-Ni)
90
- Zr
10
ternary system and Tc and n
B
of the Fe
90
Zr
10
alloy are 243 K and 1.29 μ
B
/Fe atom, respectively. For the Co
90
Zr
10
alloy the value of longitudinal linear magnetostriction λ is +3 × 10
^-6
, and the zero-magnetostrictive composition lies near (Co
.88
Ni
.12
)
90
Zr
10
and shifts to Fe-rich side with increasing Ni content.