Comment about the far-infrared absorption by small particles

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Abstract
It is shown that the agreement between measurements of the far-infrared absorption by small-palladium-particle composites and recently published calculations which used a size-distribution-dependent effective dielectric function was caused by the use of a low-frequency expansion for the magnetic dipole absorption at frequencies where this expansion was no longer valid. When the complete magnetic dipole absorption is used, theory predicts an absorption substantially smaller than is observed.