Oxygen mobility in SmBa2Cu3O7−δ measured by anelastic spectroscopy

Anelastic spectroscopy has been performed on a sample of superconducting oxide SmBa2Cu3O7−δ (SBCO) using a torsion pendulum operating with frequency around 10 Hz. A thermally activated relaxation peak is observed near 500 K with the activation enthalpy of 1.55 ± 0.03 eV and the pre-exponential factor of approximately 10−15 s, which is attributed to the mobility of non-stoichiometric oxygen by jumps in positions O1 and O5 of the lattice.