Optimization of Soft Magnetic Properties in Fe-Ni-Based Magnetic Microwires

We studied the correlation between the magnetic softness and the magnetostriction coefficient of as-prepared and annealed Fe-Ni rich microwires. We found that the hysteresis loops as well as the magnetostriction coefficients of Fe
_47.4
Ni
_26.6
Si
₁₁
B
₁₃
C
₂
microwires can be tailored by annealing. Varying the annealing conditions, we observed the changes of the character of hysteresis loops. These changes correlate with the evolution of the magnetostriction coefficient.