On the Effect of Ge Addition on the Magnetic Properties of 50 Ni Permalloy (A Metallurgical Study on the Production of Fe-Ni Alloys, IV)

Abstract

It was found out by the present author that Ge had the excellent refining action due to the formation of the stable and gaseous Ge monoxide in the temperature range of the vacuum melting of Fe-Ni alloys. In this paper, the effect of Ge addition on the magnetic properties of 50 Ni Permalloy was experimentally examined from the practical point of view.
The results obtained are summarized as follows: Ge has the effect of (1) improving the magnetic properties, (2) extending the optimum annealing temperature range, (3) reducing the dependence of the magnetic properties on the cooling rate and (4) increasing the resistivity.