The anelastic spectra of La1-xCaxMnO3 with x just below 0.50 have been measured in order to better characterize the nature of the phase transitions and microscopic lattice relaxation processes present in these materials. A peak in the imaginary part of the elastic susceptibility around 30 K below the Curie temperature TC presents a behaviour typical of inhomogeneous and glass-like systems. We have performed a quantitative analysis calculating the temperature dependent distribution function of the energy barriers of the fluctuations characterizing this nanostructured state.
Dynamics of the nanophase separation in manganites studied by anelastic spectroscopy
F Cordero;M Ferretti
2004
Abstract
The anelastic spectra of La1-xCaxMnO3 with x just below 0.50 have been measured in order to better characterize the nature of the phase transitions and microscopic lattice relaxation processes present in these materials. A peak in the imaginary part of the elastic susceptibility around 30 K below the Curie temperature TC presents a behaviour typical of inhomogeneous and glass-like systems. We have performed a quantitative analysis calculating the temperature dependent distribution function of the energy barriers of the fluctuations characterizing this nanostructured state.File in questo prodotto:
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