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The sign of the electric-field gradient tensor component along the principal axis, Vzz, in {ε}-FeSi has been determined by conversion electron M\"ossbauer spectroscopy measurements in an external magnetic field. Additional and independent determination of the Vzz sign has been provided by the asymmetry of the quadrupole doublet observed in polycrystalline samples and attributed to internal stress. The experimental results are corroborated by ab initio full potential linear muffin-tin orbital calculations. {} 1996 The American Physical Society.
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Fanciulli et al. (1996) studied this question.
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