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II.—The Effect of Load and Vibrations upon Magnetism in Nickel
Published online by Cambridge University Press: 15 September 2014
Extract
The initial irreversible effects of applying or of removing stress resemble those produced by vibrations, although these processes “may be conducted in such a way that no actual vibration takes place.” Ewing has investigated the initial effects of tension in iron, Cree the initial effects of pressure in cobalt. In iron and cobalt, tension and pressure respectively increase the induction before the Villari reversal in both metals is reached. Vibrations also in non-cyclic fields increase induction. Consequently in low fields the initial irreversible and final reversible effects of tension and pressure in iron and cobalt respectively augment each other. In nickel, on the other hand, the irreversible and reversible effects of tension must oppose each other; the latter effect lowering the induction at all stages of field increasing from zero. In Ewing and Cowan's paper, however, no mention is made of any initial effects tending towards induction increase.
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- Copyright © Royal Society of Edinburgh 1909
References
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