The thermal and electrical conductivities of several transition alloys have been measured at low temperatures at high magnetic fields. The Permalloys 70Ni-30Fe and 81Ni-19Fe show a 3% magnon conductivity at 4 K. The temperature dependence of the magnon conductivity for these two alloys implies that the magnons are scattered by the electrons through the s-d exchange.
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Yelon et al. (1970) studied this question.
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