Diffusion in a Ferromagnetic Alloy

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Abstract
Diffusion constants in an alloy of Fe+ 18%V have been determined over a wide temperature range by a combination of radioactive tracer and anelastic methods. The region of measurement extends over a considerable interval on both sides of the magnetic Curie temperature. The data show a pronounced effect of ferromagnetic spin ordering on diffusion. Diffusion in the well-ordered ferromagnetic state is about 100 times slower than would be expected from extrapolation of data in the paramagnetic region. Part of this retardation appears to be an increase in the activation energy and, part a decrease in D0.