A study was made of the magnetic properties of iron films deposited on tin foil in a high vacuum by the evaporation method used by J. C. Steinberg. The magnetization curves and hysteresis loops were obtained by an induction method in which the specimen, inserted in a search coil, was placed in a magnetic field of known strength and then suddenly removed from the search coil. The resulting flux was measured by means of a galvanometer which, in order to obtain the required sensitiveness, was kept on open circuit all the time except for an instant while the current passed through it. The results show that iron in this form possesses a high degree of hardness, displayed in a high coercive force. This hardness is now manifest in the thin films, but the maximum intensity of magnetization attainable seems to be independent of thickness. The work will be extended to include nickel and cobalt.
Proceedings of the Iowa Academy of Science
©1924 Iowa Academy of Science, Inc.
"Magnetic Properties of Evaporated Iron Films,"
Proceedings of the Iowa Academy of Science, 31(1), 378-378.
Available at: https://scholarworks.uni.edu/pias/vol31/iss1/124