The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.
a soft magnetic material consisting of 12.5–13.8 percent aluminum and 86.2–87.5 percent iron, having magnetostrictive properties—that is, dependence of deformation and stress on the magnetic field and induction, and vice versa.
The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.