Local Symmetry at Iron in Iron-Doped La<sub>2-x</sub>Sr<sub>x</sub>CuO<sub>4-y</sub>
P. Dalmas de Réotier; P. Vulliet; A. Yaouanc; P. Chaudouët; J. P. Sénateur; F. Weiss
Журнал:
EPL (Europhysics Letters)
Дата:
1990-03-01
Аннотация:
We have performed <sup>57</sup>Fe Mössbauer measurements on aligned iron-doped crystallites of La<sub>2-x</sub>Sr<sub>x</sub>CuO<sub>4-y</sub>. From the intensity ratio of the two quadrupole lines we deduce that the main axis of the elctric-field gradient does not coincide with the c-axis of the lattice. This surprising result indicates that at the iron ion the local symmetry around the c-axis is not fourfold. The implications of this result are briefly discussed.
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