%0 Journal Article
%A Lopez García,, A. R.
%A Presa Muñoz del Toro, Patricia de la
%A Rodiguez, A. M.
%T Temperature-dependence of the hyperfine interaction in the cubic phase of BaHfO₃
%D 1991
%@ 1098-0121
%U https://hdl.handle.net/20.500.14352/60217
%X The temperature dependence of the hyperfine interaction in the paraelectric phase of BaHfO₃ in the temperature range from liquid-nitrogen temperature to 1350 K has been studied. The experimental results show an Abragam-Pound mechanism for the attenuation of the angular correlation. In this cubic structure the attenuation would be consistent with a relaxation mechanism that involves O-ion hopping between vacant sites in the lattice. Using the point-charge model for the estimation of the electric field gradient produced by an O vacancy in the coordination sphere of the probe ion, the process is characterized by a correlation time τ_(c) = 12 ± 1 ps at RT.
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