Abstract
Some years age, the author discovered that iron-silicon-nickel alloys comtaining about 8_??_12% Silicon, about 14_??_18% nickel and balance iron show peruninvar characteristics, and applied the name “Senperm” to them. As the magnetic characteristics of Senperm are improved by various heat treatments, we can expect the growth of superlattice in Senperm region as in Permalloy region. Therefore the measurement of electric res resistance at high temperatures, the dependence of electric resistance (p), saturation induction (4πI∝), and seturation magnetostriction (λ_??_∝) on heat treatment or on the concentration, and X-ray analysis were carried out.
The experimental results show that the magnetic characteristics of these alloys are similar to that of Permalloy and that there would be order-disorder transformation in these regions near 350_??_370°.
