STUDY OF THE ELECTRIC FIELD GRADIENT IN EuBa2Cu3O7-δ (δ ≈ 0 AND δ ≈ 1) BY 151Eu MÖSSBAUER SPECTROSCOPY

P. Chaudouët , J. Sénateur , F. Weiss , P. de Réotier , P. Vulliet , A. Yaouanc

We have measured the quadrupole interaction parameter and the asymmetry coefficient at the 151Eu Mössbauer nucleus for EuBa2Cu3O7-δ, δ ≈ 0 and δ ≈ 1. The measurements have been extended up to 420 K and 600 K respectively. From the temperature dependence of the electric field gradient parameter VEuzz and the isomer shift we deduce that the contribution of the excited electronic state of EU3+ to the measured parameters is stronger in the superconducting than in the semiconducting oxide.

Domaines: Articles anciens

P. Chaudouët, J. Sénateur, F. Weiss, P. de Réotier, P. Vulliet, et al.. STUDY OF THE ELECTRIC FIELD GRADIENT IN EuBa2Cu3O7-δ (δ ≈ 0 AND δ ≈ 1) BY 151Eu MÖSSBAUER SPECTROSCOPY. Journal de Physique Colloques, 1988, 49 (C8), pp.C8-2161-C8-2162. ⟨10.1051/jphyscol:19888968⟩. ⟨jpa-00229256⟩