6 research outputs found
Cooperative configuration change in EuPd<SUB>2</SUB>Si<SUB>2</SUB>
No full text4f7⇄4f6+e charge fluctuations (inferered from 151Eu Mossbauer spectroscopy) in EuPd2Si2 show a strong nonlinear thermal dependence when compared to those observed in dilute Eu in LaPd2Si2. This nonlinear behavior is well described by extending the interconfigurational fluctuation model to include a cooperative intersite coupling of the interconfigurational fluctuation excitation energy to the 4f occupation number. Eu nuclear vibrational damping occurs in the region of greatest charge instability
