Speaker
Mr
Ravi Sura
(University de Rennes1 and PSI)
Description
In order to investigate the effect of strontium on the oxygen diffusion in as grown single crystals of La2-xSrxCuO4±δ (x =0, 0.05, 0.1, 0.15) we first did Oxygen Isotope Back Exchange (OIBE) experiments between 40 0C to 1000 0C We proved that free oxygen mobility can be realized for x = 0, 0.05 already below 500 0C but is depressed for x = 0.1 and 0.15. This gives evidence that low temperature oxygen mobility can be suppressed by replacing La with Sr. In order to correlate structure and oxygen diffusion as a function of temperature we did neutron diffraction measurement on grain free 0.15 single crystal on TriCS@PSI. We are planning neutron single diffraction measurements on grain free 0.05 single crystal on RESI@FRM II , both to be combined with X-ray single crystal data. SIMS (yields the diffusion constant and anisotropy on a macroscopic scale by observing the 18O diffusion on oriented single crystals) will support this on a macroscopic scale
Please specify the session
SINQ,LNS.
Please specify poster or talk
talk
Primary author
Mr
Ravi Sura
(University de Rennes1 and PSI)
Co-authors
Dr
Ceretti Monica
(University of Rennes1)
Dr
Conder Kazimierz.
(LDM,PSI.)
Dr
Keller Lukas
(LNS,PSI)
Prof.
Paulus Werner
(Université Montpellier 2)
Dr
Pomjakushina Ekaterina
(LDM,PSI.)
Dr
Prestipino Carmelo
(University of Rennes1)
Dr
Schefer Juerg
(LNS,PSI)
