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Temperature-dependence of the hyperfine interaction in the cubic phase of BaHfO₃

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Lopez García,, A. R. and Presa Muñoz del Toro, Patricia de la and Rodiguez, A. M. (1991) Temperature-dependence of the hyperfine interaction in the cubic phase of BaHfO₃. Physical review B, 44 (17). pp. 9708-9710. ISSN 1098-0121

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Official URL: http://dx.doi.org/10.1103/physrevb.44.9708


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https://journals.aps.orgPublisher


Abstract

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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Additional Information:

1991 The American Physical Society.
We thank Dr. M. Benyacar for the x-ray analysis and interesting comments, Dr. M. Weissmann for fruitful discussion, and Lic. Griselda Polla for the DTG analysis. two of us (A.L.G.) and (A.M.R.) acknowledge CONICET for partial financial support.

Uncontrolled Keywords:Physics, Condensed matter
Subjects:Sciences > Physics > Materials
Sciences > Physics > Solid state physics
ID Code:45643
Deposited On:04 Dec 2017 15:39
Last Modified:04 Dec 2017 15:39

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