HIGH TEMPERATURE PHONONS IN IRON

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Abstract
The phonon frequencies of Fe + 5 at % Si were extensively measured at room temperature, 933K, 1147K, and 1423K using neutron inelastic scattering. The most interesting features are the frequency shifts of obvious magnetic origin, with large gradients at the Curie temperature. Their interpretation in terms of magnetic contributions is discussed, and preliminary magnetic force constants are given

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