Valence inhomogeneities in intermediate-valent Eu compounds

Nowik, I. ; Sampathkumaran, E. V. ; Kaindl, G. (1985) Valence inhomogeneities in intermediate-valent Eu compounds Solid State Communications, 55 (8). pp. 721-724. ISSN 0038-1098

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In each of the intermediate valent compounds EuNi2P2, EuPd2Si2, and EuPd6B4, the line width of the 151Eu-Mössbauer resonance attains a maximum when its isomer shift varies most strongly with temperature. We associate this anomalous line broadening with a distribution of the local Eu valence, which may be described by an inhomogeneous width, Δ, of the interconfigurational excitation energy, Eexc, in addition to the homogeneous fluctuation width, kBTf. Applying this model to the analysis of isomer shift, line width, and magnetic susceptibility, the model parameters Δ, Eexc, and kBTf are obtained. Δ is found to attain maximal values at temperatures where Eexc varies most steeply with temperature.

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ID Code:45714
Deposited On:29 Jun 2011 03:14
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