A New Relation between Electrical Resistance and Energy of Magnetisation

Abstract

In two recent papers¹ I have shown that there are two effects of a magnetic field on the electrical resistance of ferromagnetic wires. At temperatures appreciably below the Curie-point (C-P.) there is an increase + ΔR of the resistance by magnetisation which attains a saturation value exactly at the saturation of the magnetisation. The relation between the magnetisation I and the change of the resistance is + ΔR = c(I² - I²₀), where I₀ is a critical value of the magnetisation process; for example, in crystals the component of the spontaneous magnetisation in the direction of the field. So far as the limit I₀ of the magnetisation, there is practically no change of resistance. The greater part of the resistance increase takes place in the region approaching saturation.